What gasoline to fill in Lada Vesta (survey and tests)

August 19, 2018 Lada.Online 99 305 26

Which gasoline to choose AI92 or AI95? This question worries every car owner. If we talk about AVTOVAZ’s new product, the Lada Vesta, it is worth noting that the manufacturer recommends using AI95 gasoline. To save money, many people start using cheaper AI92 fuel. And some, on the contrary, spare no expense and fill the tank with AI98 or AI 98G-drive..

In the operating manual Lada Vesta manufacturer

indicated that only unleaded gasoline “Premium Euro-95 GOST R 51866” or “AI-95-K5 GOST 32513-20013” is allowed for use. If necessary, it is allowed to use gasoline with an octane number of at least 92.

What kind of gasoline should I use?

The Lada Vesta tank must be filled with the type of fuel recommended in the manual that comes with the car. In addition, the type of gasoline is duplicated on the back of the Vesta hatch. According to official information, AI-95 must be filled into the Lada tank - this is due to all its 1.6-liter engines (86 hp, 106 hp, 114 hp).

What kind of gasoline should you fill Vesta with to protect yourself from problems?

In this case, it is highly advisable to do without experimentation, since the power unit is initially configured for a specific type of fuel. When filling the tank with AI-92 gasoline in the Lada Vesta, during dynamic acceleration and heavy loads, the knock sensor will start to work, and this will result in unstable engine operation and loss of speed. In addition, overheating of the motor and its accelerated wear are possible. And the possibility of the cylinder head burning out should not be discounted, as this may result in a major overhaul (replacement of valves, pistons and other components).

Information about the type of fuel is on the back of the Lada Vesta hatch.

Autoreview tests

The online magazine “Autoreview” tried to determine which gasoline is best to put into a car tank. The study involved Renault Sandero and Hyundai Solaris, which were refueled in turn with AI92 and AI95 gasoline. As a result of the tests, experts came to the conclusion that a car with more expensive fuel (AI95) accelerates better and is more economical.

Owners of older VAZ cars made similar conclusions. Based on the survey results, the majority of drivers noticed that when using AI95 gasoline after AI92, the car became a little more dynamic, and fuel consumption decreased.

There are studies that showed no difference between fuels with different octane numbers. And rumors say that AI95 gasoline contains too many additives, which can negatively affect engine operation.

AI-92 is not for LADA Vesta: The compression ratio and the quality of gasoline spoil the engine, according to the Internet

VAZ units “don’t like” when people skimp on them.

Photo: Gasoline for LADA Vesta AI-95 and AI-92, source: Rengum
LADA Vesta owners with VAZ engines often fill up AI-92 in order to save money. the mismatch in compression ratios and the questionable quality of gasoline, which shorten the engine’s life, are not taken into account.

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Compression ratio and detonation

The choice between AI-92 and AI-95 puzzled many newsmakers. AvtoVAZ itself allows the 92nd, and recommends the 95th. At the same time, the difference in price between gasoline brands is about 3 rubles per liter.

The owner of a LADA Vesta with a 1.6-liter VAZ engine calculated on his YouTube channel that it costs 150 rubles less to fill a full tank with 92-liter gasoline than with 95-liter gasoline. The “behavior” of the car does not change, but the AI-95 saves 0.3-0.4 liters per 100 km and has a longer range. At the same time, taking into account the cost of 1 liter of fuel, consumption and power reserve, 92nd gasoline turns out to be 30 rubles per tank more profitable than 95th

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However, 30 rubles is not such a pronounced benefit, a motorist who wants to extend the life of the engine

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He explains the final transition to 95 gasoline by compression ratios
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The platform and overall design have not changed, but a lot of cosmetic ones have appeared... The 1.6-liter engine on the Vesta provides a compression ratio of 10.45 atm, while the AI-92 is designed for a compression of 10.5 atm. At the same time, the engine works “at the limit”, the fuel does not burn completely, the cylinders overheat. This accelerates wear and increases the risk of detonation. The lower the octane number of the fuel, the more prone it is to detonation in modern engines, which increases the load on connecting rods and pistons.

Low fuel quality

Finding quality gasoline at gas stations is difficult. 92nd in properties may turn out to be “90th”, which will increase the load on the engine and the risk of detonation

. The ECU will slightly adjust the operation of the engine, in particular, the ignition of the mixture, but the car will lose traction. You will have to step on the gas more actively, which will lead to excessive consumption of fuel. In this case, it will not be possible to completely remove the load from the unit.

Photo: Filling LADA Vesta with fuel, sources: Angi and Drive2
In a 1.8-liter engine with a lower compression ratio than 1.6 liters, 92-octane gasoline burns worse, but there is no severe overheating, and therefore the risk of detonation is lower. However, the car's dynamics suffer.

Using AI-95 gasoline will help preserve the life of the LADA Vesta engine by delaying overhauls.

. Despite the fact that this fuel is more expensive, the risk of detonation is reduced, overheating and overconsumption are prevented, and the harm from possible refueling with low-quality gasoline is reduced - when refueling with 95, it is better to get “93” than to fill with 92, but get “90” y".

Fuel quality ranges

High-quality fuel with the same octane number from two gas stations may have different effects on the engine. This does not mean that the fuel is bad; the reasons for the difference may be the following:

• GOST requires that the octane number of gasoline, for example, AI-92, be “not less than 92,” and the fuel at one station may have this value of 92.7, at the second - 92.1.
• According to the same requirements, the tar content in gasoline should be “no more than 10.0 mg/100 cm3”, and the proportion of sulfur “no more than 0.1%”, and these indicators can also fit within the norm, but vary in value.

An experienced driver will feel the difference in the quality of gasoline and decide to abandon the AI-95 recommended by the manufacturer. This erroneous decision is supported by the presence of a knock sensor in the internal combustion engine, which, when switching to low-octane fuel, will automatically shift the ignition timing.

The sensor reacts to detonation that has already occurred, rather than preventing it.

In addition, after the knock sensor is triggered, the fuel will burn out in the exhaust manifold or, which is really bad, in the catalyst. That is, in such cases, the engine does not adapt to the fuel, but loses power, dynamics and efficiency, and the sensitivity of the gas pedal decreases.

All this speaks to the extreme inexpediency of long-term use of AI-92 gasoline in VAZ engines instead of the recommended AI-95, only in emergency cases.

What to put in the tank

At the moment, the car is produced with 4 types of motors and different compression ratios, and the petroleum products consumed are tied to the compression ratio.

Fuel brands Recommended fuel brand:

The operating instructions contain recommendations that clearly state that fuel should not be filled below the specified level. Often recommendations indicate that you can fill in 92 or 95 gasoline. It depends on the type of Lada Vesta engine:

• For HR16DE-H4M 92 gasoline is suitable;
• For VAZ-11189 and VAZ-21129 engines, both AI-92 and AI-95 are suitable;
• For the VAZ-21176, AI-92 is also allowed, but for it it is better to fill in the 95th.

Tests "Behind the wheel"

Experts from the magazine “Behind the Wheel” took two editorial Vestas. A sedan with a 1.6‑liter engine and AMT, as well as a SW Cross station wagon with a 1.8‑liter engine and manual transmission. Lukoil Ecto gasoline of different grades was poured into each car in turn: first AI-92, then AI-95, and for dessert - the elite AI-100. The races were carried out at the same time in similar weather. To minimize measurement error, the canisters were filled at the same dispenser (from the corresponding pistols, of course) at the same gas station. Test results:

What kind of gasoline do you recommend for filling the Vesta? Is there a difference when using gasoline with different octane ratings? Take part in the survey and leave your comments. Let us remind you that in another article we determine the real fuel consumption of AVTOVAZ’s new product.

Keywords: power system Lada Vesta | Lada Vesta engine

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What fuel is best for Lada Vesta

When operating the Lada Vesta, you should know that when using the 92, the engine will not develop the declared power. The rated or declared power will be observed only when using the 95th.

Although 92-grade gasoline costs less, the consumption will be higher and the dynamic characteristics will be worse. If you fill the car with 95, then the characteristics of the car will correspond to the passport.

Gasoline in Lada Vesta Car enthusiasts need to be careful about which gas station they fill the tank with. You should only refuel at proven gas stations. The quality of petroleum products can be determined by color; 92 and 95 should be transparent with a slight tint of yellow or blue. If the color is red or has a reddish tint, then it cannot be used, it is detrimental to the Vesta engine.

On some models it is recommended to use 98 gasoline in Lada Vesta. However, it is not recommended to use 98 on all models, because it is designed for turbocharged engines. Although it has a high octane number, due to additives it has low thermal conductivity characteristics. Therefore, the Lada will not have increased dynamic characteristics, but will lose in efficiency.

Antifreeze

Red antifreeze G12 from Sintec is poured onto the conveyor. In case of repair or leakage, it is necessary to top up with a similar one. You can purchase antifreeze from another manufacturer, but with the G12 specification. The system has a capacity of 7 liters, however, even if all the pipes were removed, 5 liters of antifreeze is enough. For preventive purposes, it is necessary to update antifreeze at least every 90 thousand kilometers.

Engine oil

There is no preferred oil for Vesta engines: it is allowed to use oils whose quality levels according to API standards are SN, SM and SL. Oil viscosity ratings are quite broad, so it is better to choose the viscosity range based on temperature. When operating a car in regions with temperatures reaching 40 degrees, it is best to fill in 5W-50 oil.

To change the oil in any of the VAZ engines, you will need at least five liters of fluid. The exception is engine 21129 (1.6 106 hp), which requires 4 liters of oil. There will be nothing left to top up the H4M engine.

Read on the topic: We find out what kind of oil AvtoVAZ fills at the factory and official Lada dealers for maintenance. And it's not "synthetic"

According to the instructions, the oil should be changed every 15 thousand km, but it is still better to do it more often. For example, when operating in difficult conditions, the recommended interval is 7.5 thousand kilometers. High-quality oil does not require additives.

What happens if you fill with the wrong brand of gasoline?

We have sorted out the question of what kind of gasoline Vesta runs on. Now let's try to understand what will happen to a car engine if you fill it with gasoline that does not meet the manufacturer's recommendations.

If you refuel with gasoline with a lower octane number (for example, 92 instead of 95), then it is important to try to drive very carefully without unnecessary gas changes, otherwise the gasoline may create additional detonation, and unburned fuel will burn out in the catalyst.

If you fill in with fuel with a higher octane rating (for example, 98 instead of 92), this can lead to overheating of the engine, since such fuel burns longer and is not designed for engines with a lower compression ratio.

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In any case, when refueling with the wrong fuel, the problem can be partially solved by diluting it with gasoline with a higher octane number. When refueling AI-80 or DT in vehicles not intended for this fuel, it is necessary to flush the fuel tank.

What kind of gasoline should I fill in the Lada Vesta?

During its short presence on Russian roads, Lada Vesta managed to give its owners a lot of recommendations for its operation, which do not always coincide with AvtoVAZ’s instructions and even differ depending on the circumstances. Let's consider the relevance of following the recommendations of the Lada manufacturer regarding the brands of fuel used.

The influence of fuel quality and driving habits on the choice of gasoline

These are the test results, but that's not all. We found out that the use of low-octane fuel, such as AI-76, AI-80, is excluded due to detonation and engine failure , and the use of top grades is not economically feasible. The brands prescribed by the manufacturer remain under consideration.

Many supporters of the use of AI-92 say that 95 gasoline is the same as 92 gasoline, only with the addition of additives. Indeed, producing fuel with a given octane number is an expensive technology.

If a product is made with additives at the factory, in compliance with all requirements, and fully complies with quality standards, there is no reason not to use it.

Another thing is that this does not always happen, and additives are also different. If you were given a fake 95 at a gas station, there is a chance that its real octane number is higher than 92. A diluted 92 will most likely be outside the acceptable range.

When filling up with 92 gasoline, be especially picky when choosing a gas station. Detonation, which we all try to avoid, occurs mainly when the engine suddenly accepts a load, especially when it has not yet reached the appropriate speed.

If your driving style is smooth, devoid of sudden accelerations, and you go up hills by lowering the gear rather than simply pressing on the gas, then fuel with a lower octane number is probably preferable for you. Fans of drive, as well as beginners, and everyone who does not yet feel the breath of the engine very well, will feel calmer with the 95.

Recommendations

From this we can conclude that:

• It is necessary to fill the Lada Vesta with gasoline recommended by the manufacturer;
• You must refuel at proven gas stations;
• As a last resort, you can refuel with 92, but in this case you should fill in the appropriate additives.

You should not experiment and use other types of petroleum products. The savings will backfire; Vesta’s engine will have to be overhauled. Use the 92 only in extreme cases and drive in a gentle manner.

Realities

In practice, circumstances can be very different. In large cities, control over the quality of fuel sold is carried out more effectively than in the outback. At gas stations with difficult-to-remember names, AI-92 gasoline may be preferable to AI-95, which can be obtained by adding cheap, low-quality additives to cheap gasoline. In such cases, you just have to rely on your driving sensations and the condition of the spark plugs, soot on which, especially red in color, will indicate the presence of harmful substances in the fuel.

Is AI-98 necessary?

Commercial gasoline AI-98 is a fuel obtained by adding to the base of all gasolines - high-octane gasoline, reforming a significant amount of high-quality octane-increasing additives (16%), promoting complete and more uniform combustion of the fuel. The use of high-quality AI-98 in Lada Vesta will not cause any harm to the engine of any Lada model; rather, on the contrary, it will ensure smooth operation of the power unit, an increase in power of 5-10% and even a slight increase in efficiency.