What kind of gasoline should I fill a Priora with 16 valves? – Car repair – let’s just talk about the complex

The car has entered our lives forever. Nowadays, it is no longer a luxury, but a necessary means of transportation. The age of speed has come, everyone needs to hurry: to work, to study, to rest, for various important matters, and having your own transport is more reliable, and there is a greater opportunity to be on time everywhere. There are many brands of cars, and the gasoline they use must match a certain model. Today, the more popular brands of gasoline are AI-92 and AI-95. Which is better for a domestic car Lada Priora?

Automotive fuel

Gasoline is a mixture of hydrocarbons that has the following properties:

• highly flammable;
• mostly colorless;
• density 700-780 kg/m2;
• highly volatile and flares up at 20-40° C;
• boils at 30-200° C;
• freezes at -60° C.

To improve the quality, 0.07-0.2% additives are added to the fuel:

1. Antiknock agents (monomethylaniline 15%).
2. Antioxidants.
3. Anti-corrosion agents for metals.

Bon appétit!

First, fill in AI-92. When the trip computer of the first Vesta showed dashes (the minimum numerical remaining power reserve is 30 km), we prepared for the fact that the engine was about to stall. Not so! As it turned out, the cars easily drive several tens of kilometers before the engine stops.

The Vestas showed absolutely the same average consumption of the “ninety-second” - 6.7 l/100 km. We take it as a starting point for subsequent measurements. An interesting detail: the trip computer of the five-door SW Cross shows the fuel consumption almost without distortion, but the sedan underestimated the result by a liter (it showed 5.7 l/100 km in this mode), and the situation was repeated in subsequent measurements. Very strange behavior - the counters have the same design.

Let's move on to AI-95. Both testers did not notice the difference in the behavior of each of the cars on higher octane fuel. The resulting fuel consumption was also not surprising: the SW Cross station wagon dropped one “ten” - to 6.6 l/100 km. The less powerful sedan saves a little more: minus 400 ml, the result is 6.3 l/100 km. But with the same driving sensations, why pay more? Without a calculator, it is obvious that in such modes it is cheaper to drive the AI-92.

For dessert - AI-100. And then a surprise awaited us. Neither SW Cross nor the “simple” Vesta could improve the result of “ninety-five”! Elite fuel did not provide any advantage, and the elasticity of the 1.6 engine turned out to be even worse. Although this is not such a sensation: almost five years ago we already tested the Chevrolet Cobalt and Nissan Almera sedans in a similar way (ZR, No. 12, 2013), and then the “premium” AI-98 was also not surprising.

But this is driving in steady conditions. Perhaps instrumental dynamics measurements will open our eyes?

Is it possible to fill in 95 (98) gasoline instead of 92. What will happen to the valves, let’s look at the consequences

Not long ago I wrote an article on the topic of what gasoline to pour, 95 or 92 , into the engine of my iron horse. The article turned out to be quite popular, especially on the YouTube channel. Readers began to ask a lot of questions, and perhaps the most popular one was: is it possible to fill in 95 or 98 instead of 92 gasoline according to the car’s passport? Will the valves burn out, will the pistons melt? And in general, what will be the consequences? The question is really interesting, so there will be both an article and a video version, in general it’s interesting, so let’s read and watch...

Features of the production of 98 gasoline

To understand the difference between these two types of fuel, it is worth understanding the technology for producing fuel from oil. There are two main ways:

• old, based on direct distillation of petroleum products. This process is reminiscent of moonshine production. Light fractions evaporate and heavy condensate forms. This method can produce gasoline with an octane number of no higher than 60. Therefore, manufacturers used various additives, and sometimes toxic mixtures containing lead. But it is still impossible to obtain, for example, 98 gasoline in this way, and at this time it has been almost completely abandoned.
• The modern method is to use cracking. Cracking can be thermal or catalytic. In the process, the carbon bond is broken and carbanions are formed, at the same time the reaction components dehydrogenate, isomerize and polymerize. This method is more complicated than the previous one and allows you to obtain a larger volume of product with higher quality. The base fuel obtained by this method has 75-80 units and therefore requires fewer additives.

There is also a method of catalytic reforming, in which it is possible to obtain base gasoline with an octane number of 92, but it is not economically viable and is not used in Russia.

The main technique used by domestic fuel producers is cracking. But even at the highest level of production, this method will produce a maximum of 85 octane units. The rest is additives. That is, the production of 95 gasoline is practically no different from the production of 98 gasoline.

About power and reducing consumption

Many people write that when they started using 95 (98), fuel consumption dropped, and the car began to pull like crazy! It is not always possible to believe such words, although there is some truth in it. I specifically highlighted this point.

Actually, as you can understand from the previous paragraph, the higher the “octane number”, the “softer” and more evenly the gasoline burns, AND ALSO THE LONGER IT BURNS IN THE ENGINE CYLINDERS. And this means THE PISTON PUSHES LONGER, even if the difference is a percentage, BUT IT REALLY IS. So much for the received power - YOU SHOULD NOT EXPECT THE MOTOR TO “BREAK” FROM PLACE, but a little power will be transferred, usually from 3 to 7% (often before the increase, less than 10% is not felt by the driver). Also, fuel consumption will drop by approximately this percentage, that is, a maximum of 7%, although it all depends on the driver; if you “fry”, not only will the consumption not fall, but on the contrary, it will increase.

That is, you can achieve savings and increase power, but it will be within the error.

AI-95 or AI-92: what fuel to fill Ladas, Renaults and Nissans with

A comprehensive answer about the octane number of the gasoline used should be contained in the vehicle operating instructions. But within the AVTOVAZ and Renault-Nissan group there is no single approach - different types of fuel are prescribed for the same engine installed on different models.

LADA > Kalina

Nissan > Almera

Renault > Logan

Renault > Sandero

Look at the table - all presented cars are equipped with engines produced by the Volzhsky Automobile Plant. The source of the fuel data given is the latest operating manuals.

What will happen if you fill Priora with 98 gasoline?

This type of fuel will burn much longer and slower in the engine cylinders (its octane number is higher than 95). Consequently, after the fuel is ignited, the gas exhaust system, as it should be, will open before the moment of its (fuel) complete combustion - the combustible mixture will flow to the engine valves, which will lead to their heating and burning. The result is destruction of the valves, disruption of the engine, and its stopping. Of course, there is a solution to the problem - replacing all the valves and overhauling the engine, which is very expensive.

About burning gasoline

I would like to explain a little how gasoline of different octane numbers burns; we need this to understand the power and small savings.

1. 76 (80) gasoline - burns quickly and does not last long, I would even say explosively. It flared up quickly and went out quickly.
2. 92nd - ignition is not so explosive, but gradual, that is, the flame spreads much “softer”, and combustion also takes a little longer.
3. 95-98 - it becomes clear that the higher the octane, the softer the spread of flame in gasoline (if I can say so), more evenly or something. YES, this fuel burns longer.

Therefore, performance on high-octane types seems softer and the engine runs quieter. IT DOESN'T APPEAR, in fact it is so.

What Gasoline to Pour into Kalina

So, for the entire time I owned my Kalina, which is already more than two years and the odometer mileage is over 40,000 km, I refueled with both the most expensive 95th and the cheapest 80th fuel (there were hopeless situations). And I would like to share my experience of refueling various types of fuel.

As the manufacturer recommends, even for 8-valve engines, it is necessary to fill in gasoline with the same octane number. At first, I listened to this advice, measured fuel consumption and for about 100 km at an average speed of 90 km/h the figure was no more than 5.5-5.8 liters.

I turned out the spark plugs and they were fine, there were no deposits or red deposits, the engine ran properly and smoothly. In short, everything suited me.

But after the car had traveled more than 10,000 km, and had also been run-in, I decided to try feeding it with cheaper gasoline, and below I’ll tell you about the shortcomings, if any!

92 Gasoline vs 98 / Test on Lada Kalina with power measurement

As you probably guessed, I didn’t notice any difference between the octane numbers at all. The same confident engine start, smooth operation at idle and at high speeds, no detonation and not even a hint that the car didn’t like anything.

After driving another 10,000 km only on 92nd fuel, I decided to unscrew the spark plugs again and assess their condition, and as it turned out, they were ideal, the same light gray color without the slightest deposits, which indicated a completely serviceable engine and power system .

As for consumption, this indicator has not changed at all throughout the entire time, the dynamics and traction remained the same. I concluded that the engine makes absolutely no difference to these changes of 3 units of octane number.

These, of course, were not experiments of their own free will, but my Kalina had to drive a couple of times even on the AI-80, which does not fit in with injection engines at all. There were cases when gas stations along the highway did not have other types of fuel, and therefore we had to get to the next station using what we had.

But, to be honest, when after filling five liters of this fuel into a completely dry tank, the car felt the same as on the 95th, I was simply shocked. Everything remained at the same level, consumption, acceleration and other characteristics.

Of course, I did not intend to carry out further such experiments, who knows what long-term operation would show, but the fact remains a fact.

My conclusion

Maybe for modern 16-valve engines the difference in octane numbers will be significant, and will somehow affect the parameters and characteristics of the engine, but on proven eight-valve 8-valve engines, I personally didn’t notice it at all. Yes, and by the way, regarding the 16th grade.

engines: a friend and I drove a ten and filled it with the cheapest eightieth gasoline several times, and everything worked like clockwork, so in this case there is something to think about.

Or maybe there is no difference at all between all these figures except for the price? After all, we must not forget what country we live in! And it has long been known that 95 in principle does not exist in Russia; it is made by adding all kinds of additives, which are unknown how they affect the engines of our cars, positively or negatively! I would like to hear from other car owners, what is your experience of refueling Kalina, and other cars, and do you notice a real difference (without any self-hypnosis) between one type of fuel or another?

Source: https://5net.ru/kakoj-benzin-zalivat-v-kalinu/

Lada Priora owner reviews

With engine 1.6 90 l. With. 8 valves

• Yuri, Moscow region. A car for all occasions, bought in 2009. A car with a 1.6 engine, 90 hp. With. enough with a bang. I don’t see the point in overpaying for a more powerful motor, because in addition to dynamics, I also need savings. Average consumption is 8-10 liters.
• Alexander, Nikolaev. The car was produced in 2008, with a 1.6-liter engine. This is my first car. I bought it as a sedan, with a manual transmission, air conditioning and ABS. Compared to my last ten, the changes are significant, firstly, the interior and sound insulation. It really became more comfortable in the car. In general, Priora is perceived as more modern. Although the space in the cabin has not changed. The same narrow interior, I would also note an almost unchanged body. Huge respect for the stern, which looks simply awesome compared to the fat-assed ten. A 90-horsepower engine consumes 8-10 liters, the maximum speed is 180 km/h.
• Dmitry, Irkutsk. I'm happy with the car, a car for every day. I use it in the family, at the dacha and for other household needs. I like the car, it's simple and easy to maintain. I'm quite happy with it. Gasoline consumption is 9-10 liters with a 1.6-liter 90-horsepower engine.
• Oleg, Nizhny Novgorod. Lada Priora was purchased in 2022, the version after restyling. The salon has especially changed. There is a touch multimedia display, and in general the front panel looks at the level of European competitors, even cooler than that of Renault Logan. I have a 1.6-liter 90-horsepower version with a consumption of 9-10 liters.
• Alexander, Saratov. I have a 90-horsepower Lada Priora, I’m satisfied with its power and dynamics. A comfortable and fun car for every day, it can save fuel, although it supports gasoline not lower than AI-95. Average consumption is 8-10 liters per hundred.
• Mikhail, Ryazan. I have a Lada Priora with an 8-valve engine, its power is 90 hp. With. enough with a reserve, in the city you can keep within 9-10 liters per 100 km. I would also note good acceleration dynamics. The first hundred in 12-13 seconds, which is quite good for a budget car. The main thing is to quickly change gears and keep the gas to the floor. The Priora has good driving potential, because it has an excellent pedigree - my former top ten knocked everyone down at traffic lights. Priora is a fairly reliable car, well, at least in its 80 thousand mileage it has never gotten stuck in the middle of the road.
• Vladislav, Ekaterinoslavl. I'm happy with the car, the car is worth the money. I bought it in 2010, the 90-horsepower version. Soft and impenetrable suspension, just for our roads. Consumption in the city is 10 liters.

With engine 1.6 98 l. with 16 valves

• Maxim, Nizhny Novgorod region, 1.6 98 l. With. I like the car, I bought a Priora in 2007 on the secondary market. I'm happy with the car, it's a decent option for those who don't need show-offs. The car is powerful, with a 98-horsepower engine. Acceleration to hundreds in 11 seconds, on par with competitors. Overall, excellent dynamics for little money. As they say, why pay more. I fill up with 95 gasoline. In the urban cycle you can achieve 10 liters per 100 km, on the highway it turns out to be 7-8 liters per 100 km.
• Dmitry, Yaroslavl, 1.6 98 l. With. I purchased a Priora in 2022 and am happy with the car. A good high-torque and moderately economical car, suitable for every day around the city. Consumption is 8-10 liters per 100 km depending on driving style.
• Denis, Smolensk, 1.6 98 l. With. I have been using Lada Priora for four years, the version before restyling. I would like to note the spacious interior, convenient and understandable controls; in terms of ergonomics, there is nothing to complain about. I’m not particularly picky, because this is still not a foreign car, but the most affordable car in Russia. Proven design, all components and assemblies have been thoroughly studied. Average consumption is 10 liters per 100 km.
• Sergey, Stavropol region. The best car for your money. I'm happy with the car; by the way, I have the 1.6-liter 98-horsepower version. The acceleration potential of my Priora is at the level of more top-end foreign cars, I am pleasantly surprised. A reliable and cheap to maintain car, suitable for the city. Consumption 9-10 liters.
• Dmitry, Ekaterinoslavl. I'm happy with the car, the car is equipped with a 1.6 engine and produces 100 horses, a wonderful car with the most popular engine in Russia. Equipped with a 100-horsepower engine, it consumes a maximum of 10-11 liters when driving fast.
• Yuri, Vologda region. Overall, I am satisfied with the Lada Priora; it is a reliable and unpretentious car. Consumption of 10 liters of 95 gasoline.
• Svetlana, Moscow region. I praise the Lada Priora for its comfortable and spacious interior, omnivorous suspension and good handling at city speeds of 60-80 km/h.
• Oleg, Tomsk. Lada Priora 2009, with a powerful 1.6-liter 16 liter engine. The manual transmission unleashes the full potential of the 98-horsepower engine. In general, a worthy option for those who want good dynamics for little money. The tenth family, as far as I know, has always been famous for its good directional stability and good overclocking potential, despite its relatively modest characteristics. Although the Priora’s power is no worse than its competitors. I drive quite fast, in the city I get around 10 liters per 100 km.
• Boris, Irkutsk. I took the Priora purely for the city, it consumes an average of 9-10 liters/100 km. A machine for the soul, equipped with a powerful 98-horsepower engine. It is enough both in the city and on the highway.
• Alexey, Perm. Lada Priora is a worthy representative of the domestic automobile industry, and a worthy successor to my last ten. Still, the changes are significant. I have a restyled version from 2015 and have been using it for three years now. Mileage 98 thousand km, flight normal. You can easily accelerate to 200 km/h.
• Boris, Nizhny Novgorod region. Lada Priora is a simple and unpretentious car, with good dynamics and brakes. I have the 98 hp 2022 version. Modern equipment, dynamics and comfort at the level. Consumption 9-10 liters.
• Alexander, Smolensk. I'm happy with the car, the car suits me for all occasions - Priora is irreplaceable in the family and at work. Consumes 8-10 liters of 95 gasoline per 100 km, the power is enough for everyday needs.
• Dmitry, Sverdlovsk. My Lada Priora with a 1.6-liter 16-valve 98-horsepower engine is an excellent option for urban, suburban and suburban conditions. Satisfied in all respects - simple and discreet design, convenient and ergonomic controls, but all this is worth nothing compared to the stunning dynamics. Although there is plenty of noise in the cabin, especially at high speeds. Average consumption is 9-10 liters per hundred.

With engine 1.6 106 l. With. 16 valves

• Oleg, Arkhangelsk. I liked the car, it's a great option for the money. Mileage 2022, I service it myself in the garage. The car is equipped with a 106-horsepower 1.6 engine, I have the top-end configuration. Priora easily reaches 200 km/h, accelerating to hundreds in 10 seconds. It handles and brakes well, an excellent option for the city. Overtaking is easy, and the average gasoline consumption is 10-11 liters.
• Konstantin, Nizhny Novgorod. I'm happy with the car, it's a worthy option for family and household needs. I took a Priora in the top-end configuration, with a 16-valve 1.6-liter engine. The power of 106 horses is more than enough to reach the first hundred in 10 seconds. Average consumption is 10-11 liters.
• Vitaly, Belgorod. My car is equipped with a 1.6-liter 106-horsepower engine and consumes an average of 10-11 liters/100 km. In my opinion, this is the best unit in the history of AvtoVAZ. Optimal volume/power ratio, plus excellent overclocking potential. Average consumption is 10-11 liters.
• Victor, Vladimir region. I have a 1.6-liter Lada Priora, it produces 106 horses. Hurricane dynamics, acceleration to hundreds in 9-10 seconds. I praise the Priora for its good dynamics and brakes, and the handling is also at the same level. Average consumption is 9-10 liters of 95 gasoline.
• Georgy, Irkutsk. Lada Priora is our people's car. I love the domestic auto industry, it’s inexpensive and durable, easy to operate and maintain. Like a constructor - you install new parts after each breakdown, and so on, and so on ad infinitum. A car with a 106-horsepower internal combustion engine consumes 11 liters.
• Alexander, Nikolaev. Lada Priora is worth the money spent. I didn’t regret one bit that I didn’t take Renault Logan. Priora is cheaper, and at the same time more powerful and faster. And comfort and reliability are no worse, at least Priora is much cheaper to maintain. Simple design, and in a pinch you can service it yourself. Gasoline consumption with a 1.6-liter engine is 10 liters in the city and 7-8 liters on the highway.
• Evgeniy, Saratov, 1.6 106 l. With. I read a lot of reviews about Priora, the best option for urban and suburban conditions. Cheap and cheerful, but with amazing dynamics. Average consumption is 10-11 liters/100 km.
• Oleg, Vologda region, 1.6 106 l. With. A decent car, the Lada Priora pleasantly surprised me in terms of handling and especially dynamics. And at the same time, it is economical and quiet in the cabin, although only at low speeds. Objectively, I will say that the main thing for me is dynamics and inexpensive maintenance. Priora has everything in order with this. As you know, if you buy an expensive foreign car, you will feel sorry for it. With Priora this feeling does not arise. You pile it up as you want - you still know that the repairs will be relatively cheap. Consumption is 10 liters/100 km.
• Konstantin, 1.6 106 l. With. I have a Priora in the most powerful configuration, it produces more than 100 horses. The best option in terms of dynamics and price. I advise you to take it, you won’t regret it. The 16-valve engine rules, I get 10-11 liters per 100 km.

Will the valves or pistons burn out?

These horror stories came to us from old carburetor cars. Where there were often only two types of gasoline, 76 and 93. And pouring 93 into an engine with 76 was not recommended! Why? YES because the carburetor could not automatically adjust the “octane number”, and it turned out that the mixture was still burning in the cylinders, but the exhaust valves opened and were melted by this flame!

YES this really happened, but if you adjust the carburetor to use high-octane fuel, then nothing bad will happen either.

Modern cars often already allow the use of all types of fuel; in the instructions for use, you can see the following inscriptions:

• From 91 to 99
• At least 92
• Not less than 95
• 95 is recommended, but 98 is possible

And so on. What this tells us is that often modern engines can operate on almost all modern standards. If we say in your car, at least 92 is recommended, then this means that you can fill in all types and 92, 95, 98.

If the car is designed for 95, then you can fill it with 95, 98. BUT if you fill it with 92 and detonation occurs, then the ignition angle will immediately be corrected by the “knock sensor”; this is exactly what it is designed for.

That is, modern engines, in the literal sense of the word, are SMART! Based on a bunch of sensors, the ECU will make the necessary decision and launch the necessary algorithm with this particular type of fuel.

So - NOTHING WILL BURN OUT FOR YOU, NOT A VALVE, LESS THAN THE PISTONS.

Advice from motorists

Often, car owners try to listen to the advice of other drivers, including on the issue of how to refuel a VAZ 2114. True, the advice here is radically different - one half drives a 92 and praises it, the other is in favor of a 95, because that’s what’s written in the passport and this is right".

In such a situation, it is worth recalling the above phrase once again - a difference of 3 octane units is quite insignificant and is poorly perceived by both the car and its driver (in the latter case, most opinions like “better are subjective”). An objective assessment here could be fuel consumption or the degree of wear of some elements, but they are almost the same (of course, there is a difference, but it is very small).

It is for this reason that we can say with confidence that it does not matter what kind of gasoline is poured into the VAZ 2114 - 92nd or 95th, what is much more important is not its octane number, but its quality.

Gasoline for VAZ 2114

A few octane units is a practically insignificant difference, making 95 and 92 gasoline interchangeable, not only when refueling domestic cars, but also when refueling many foreign cars.

Which products to choose

Now let’s devote a few lines to what kind of oil should be chosen for the engine in the Priora. The most important thing is to always make a choice in favor of quality products. What do you need to do to buy a truly suitable and correct oil and not cause damage to your engine? The answer is obvious: contact only trusted retail outlets, read reviews from other customers. You shouldn’t chase savings so that you don’t have to pay for early repairs of cylinders, pistons or valves.

This car comes off the assembly line filled with semi-synthetic oil produced by Lukoil. But not only the products of this manufacturer are suitable for filling, but also a number of other brands, such as:

• Rosneft;
• ESSO ;
• Shell;
• Mobil;
• Ravenol;
• ZIC and others.

The oil must be filled with oil that is suitable for use in gasoline engines. This is a classification type A3/B3 according to the standards of the international organization ACEA. There is another important criterion - the viscosity of the lubricant. It is also very important to pay attention to it. It must be selected taking into account the conditions in which the vehicle will be operated, and this is true not only for the Priora in this case. If frosts in your region exceed 35 degrees Celsius, but there is no great heat, then it is better to use 0W-30 grade lubricant. For the temperature range -25 - +25, 10W-30 oil is suitable. In hot regions, 15W-40 products may be optimal.

Which gasoline is better?

The technical passport of a specific vehicle is important. If the car's engine is not designed for 98 gasoline, it may simply not withstand working on it. The valves will constantly become hot and eventually burn out. AI-98 is intended for highly accelerated engines.

It makes sense to fill in 98 gasoline when the vehicle’s engine has a thermostat, and the engine is regularly loaded after warming up at idle, for example, the driver lives in a big city and often gets stuck in traffic jams. Also, the likelihood of detonation increases with increasing ambient temperature, so in hot weather 98 gasoline, which has a higher octane rating, makes sense.

What problems can gasoline with an octane rating of 98 or 100 bring?

If you drive a Lada Kalina and decide to turn it into a Mustang by filling it with 100 gasoline, problems can come quite quickly. Small naturally aspirated engines do not receive any of the benefits described above. Consumption often remains the same; dynamics may only improve slightly. Otherwise, your Kalina will continue to just drive without any benefits. But if such fuel is used for a long time, a number of problems will arise:

• the fuel pump may well break down due to additives unknown to it, which can be detrimental to the car, especially if it is quite old;
• valves in the engine can burn out and suffer a number of other damages due to excessive combustion temperatures and other factors that such a fuel mixture causes in a car;
• increased wear of power unit parts may occur, which occurs with an increase in the temperature and intensity of fuel combustion in simple atmospheric units;
• it is also quite possible that there will be increased consumption due to disruption of the usual operating modes of the power plant, which obviously will not please the owner of the equipment who is reassured by the advertising;
• a sudden change of fuel can also negatively affect the operation of the injector, but this is more common in older foreign cars, which already do not boast of its cleanliness.

Such problems can accompany the use of expensive 98 or 100 gasoline. You can use a small amount of fuel to test all its benefits. But in this case, it’s not worth filling the tank full and carrying out various test drives. You can easily ruin the engine and fuel system. In addition, there is an option for a rather dramatic manifestation of the negative consequences of such refueling of your car.

Increased fuel consumption on Lada Priora: why?

Quite often, an unreasonable increase in “appetite” is associated with malfunctions of elements of the electronic engine control system. The most vulnerable components involved in calculating the optimal mixture composition are:

• throttle position sensor (TPS), mounted in the throttle body;
• coolant temperature meter installed in the cylinder block housing;
• oxygen sensor (lambda probe), located in the exhaust manifold housing;
• mass air flow sensor (MAF), mounted in the pipe supplying air to the throttle;
• Idle air regulator (IAC), mounted in the throttle assembly.

Faults of this kind are diagnosed using special hardware and eliminated by replacing sensors with known good ones. Installing a new sensor with an incorrect code may cause an increase in “appetite”.

However, other reasons may also contribute to the increase in fuel consumption on a Priora with a 16-valve engine:

• low and unstable pressure in the fuel system, indicating clogged injectors, low fuel pump life, clogged filters in the system;
• clogged catalyst, causing the preparation of an enriched mixture;
• a dirty air filter, which not only disrupts the operation of the mass air flow sensor, simultaneously reducing its service life, but also provokes the occurrence of the phenomenon of “air starvation”;
• cold or constantly overheating engine (especially important when the thermostat is not working).

Often the consumption increases due to incorrect operation of the adsorber purge valve.
The situation returns to “normal” after replacing the defective unit with a known good one. Fuel consumption may increase due to air leaks in the power system. Often the place of “unwanted recharge” is the fittings located on the rear side of the sound-insulating plastic motor casing with the inscription “16 VALVE”. By placing plugs on the brake cylinder bleeder fittings on the components in question, you can prevent air leaks.

Is it possible to fill 92 gasoline instead of 95 in a Lada Granta, which is better?

There is an opinion among owners of domestic cars that their vehicles can be fueled with almost any fuel that is on the market. This statement dates back to those times when, apart from the “VAZ classics,” nothing more modern could be found on the roads.

Only 95 gasoline?

AvtoVAZ recommends 95 type gasoline

Modern VAZ cars are equipped with a large number of electronic systems that require good treatment and quality care. This also applies to the brand of fuel that is filled into the tank.

But is it worth adhering to the recommendation, or can you deviate from it a little? Now we will find out about this.

Is it possible to refuel with A-92 gasoline?

There is such a thing as octane number, which is determined in digital terms by the name of the fuel. If the vehicle in question is recommended to use 95 gasoline, there are reasons for this.

The fact is that the engine, which is designed for A-95 gasoline, can start working with any type of fuel. He won't do octane tests. Instead, to put it simply, it will treat any gasoline as if it were A-95, compressing it accordingly.

And, given that A-92 fuel has an octane rating of three units less, its possible compression ratio may be lower than in the case of the recommended fuel. This may not be noticeable if the engine has already traveled more than one or two hundred thousand kilometers, since the compression performance of the combustion chamber decreases somewhat.

Try to refuel at large chain gas stations.

If you fill in with high-quality 92-grade gasoline, then no errors will appear on the instrument panel after starting the engine; this is precisely the main argument of those who like to refuel with gasoline with a lower octane number.

So, if you do not want to hear the sounds of detonation, and also eliminate premature wear of car parts in the near future, then you should listen to the recommendations of the car exactly what is written in the operating instructions.

Video of a test measurement of the real octane number of 92 gasoline

The video below shows the process of measuring the octane number of gasoline that was purchased at regular gas stations in Novosibirsk. Only one sampler showed the presence of truly 92-grade gasoline.

Simply put, the result of using any fuel with a lower grade will be the appearance of unintended detonations and difficulty starting a cold engine.

They are very small local explosions that damage the condition of the cylinder and, to some extent, the piston. Moreover, all this can lead to increased wear and, most importantly, increased fuel consumption.

So any attempts to save on cheaper gasoline will be doomed to failure.

What then to do with “older” gasoline?

Let's fill up with 98?

If you consider the above information, you might think that it would then be advisable to fill your car with gasoline with a higher octane number. For example, this could be the A-98, which is the standard for many modern foreign-made cars.

But here again we will have to disappoint you, since the mechanism requires a clear and correct attitude towards itself. Therefore, if the compression ratio is designed for A-95, then A-98 gasoline will be compressed to exactly the same level. And the potential of this fuel can only be revealed when its compression force is higher, which the Lada Grant engine is not designed for.

A few words about American and turbocharged engines

I was also bombarded with the following questions: “I bought a car imported from the USA, it says that you need to use AKI 91 gasoline. What is this, and what kind of fuel should I choose?”

The US market has slightly different standards; their classification is not like ours (that is, “research”). The abbreviation AKI means a conditional, average designation of two indices ((“research” + “motor”)/2).

If we bring it closer to our standards, we get something like this:

AKI87 = AI92

AKI89-91 = AI95

AKI93 = AI98

I would also like to note the turbocharged options; in the last article I said that it is recommended to use at least “95” in them.

Let's think logically, why 95 and 98? Turbocharged engines use much larger volumes of air and fuel, the mixture in them must be richer, and from the points above we understood what ENRICHED fuel is, it gives us more octane. Think for yourself - WHY BUY A TURBO, AND FURTHER FEED IT WITH LEAN MICHES, it’s just not designed for that! The amount of air must strictly correspond to the caloric content of the fuel.

It is also worth noting that when using the “92”, as many manufacturers indicate, the “required temperature regime” may be violated, which may lead to the failure of some components, in particular the “turbine” itself.

Therefore, in TURBO, only “what the doctor ordered”, otherwise it is fraught with repairs

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