If you've ever been to a gas station, you've probably noticed that there are several options for gasoline to fill your car with - usually 92 and 95. Many people think that the higher the number, the better the gasoline, and therefore more expensive. This is not entirely true. What do these numbers mean, and why doesn't diesel have them?
What kind of gasoline is actually better to fill in - 92 or 95? To understand the numbers well, we need to first understand the workings of a gasoline engine.
The principle of operation of a gasoline engine
Both gasoline and diesel engines are internal combustion engines. This means that the energy source is burned within the engine itself rather than from outside (think of a steam engine where coal is the energy source to heat the steam in the engine, providing power). However, one of the important differences between gasoline and diesel engines is that gasoline requires a spark plug to ignite the air-gasoline mixture at certain times.
The problem occurs in a gasoline engine when the mixture of compressed air and gasoline ignites on its own prematurely before the spark plug fires it at the right time, causing it to explode in the combustion chamber. This causes a knocking sound in the engine, which is why the problem is called engine knocking.
Gasoline contains a mixture of octane (hydrocarbons with 8 carbon atoms) and heptane (7 carbon atoms). The numbers 92, 95 refer to the octane number of the gasoline, or the amount of octane present in the gasoline. The octane number of gasoline is an indicator characterizing the detonation resistance of the fuel, that is, the amount of the fuel’s ability to resist self-ignition during compression for internal combustion engines. That is, in simple words, the higher the “octane level” of the fuel, the less likely it is for the fuel to spontaneously ignite during compression.
Which gasoline is better to fill in - 92 or 95
The average price for gasoline in Russia ranges from 30 to 36 rubles per liter. When AI-92 fuel costs 30 rubles, AI-95 costs 33.2 rubles, and AI-98 costs 36.5 rubles. Based on this, we calculated the cost of 20 thousand mileage, and the following picture appeared before us:
- AI-92 - 63,960 rubles;
- AI-95 - 73,100 rubles;
- AI-98 - 76,880 rubles.
It turns out that using low octane gasoline is most beneficial. But according to the manual, using low octane fuel is less economical than using higher octane fuel. This is true?
The concept of "good gasoline"
What do you think “good gasoline” means? This is fuel, a gas station that makes the car easy to drive and, most importantly, consumes less. Any instruction states that diesel is better and cleaner, so it is more economical. Purity and quality are determined by the octane number, and the higher it is, the better.
Some car dealers allow you to fill the tank with any octane grade of gasoline, while others only allow you to fill the tank with high-purity gasoline.
Today the standard divides fuel into four categories:
- gasoline is normal 80th;
- regular AI-92;
- Premium-95 gasoline;
- Super gasoline - 98.
Hello everyone, today in the “Which is better?” section. we will talk about the most pressing issue, namely that which gasoline is better pour A-95 or A-92 into the tank. In the article we will weigh the pros and cons of each of the candidates and summarize so that you can make the right choice of fuel for your car. It would seem that everything is very simple, pour what is best (according to the majority), then, what costs more or what the car manufacturer indicated in the technical specifications. In principle, all over the world this is exactly what everyone does, but in our country, you can’t always believe what is written, so the AI-95 brand does not always hide exactly the same 95th gasoline recommended by the manufacturer. Given this fact, it is not surprising that many motorists do not want to overpay for imaginary quality. And if, moreover, we are talking about gas stations on the outskirts, where there is no quality control as such, instead of the same 92, they can pour in anything you want and then it will be very difficult for you to prove anything. Everyone is “bad”, the only question is how much, and this already depends on whether the same gas station owner has a conscience or lack thereof. Although what kind of conscience can there be in the matter of “cheating”? Everyone probably knows what happens after you pour poor quality gasoline into your tank; the result depends on many factors. Firstly, how much of this gasoline will you fill, secondly, how long will you refuel with this fuel, and thirdly, what type of engine do you have. One thing is for sure: in any case, nothing good awaits you with such fuel.
Which gasoline is better everyone decides for themselves, guided by some of their knowledge, 92 or 95 or perhaps 95 with the prefix “Energy”, “Pulse”, “Mustang”, etc. Therefore, my article today is nothing more than a discussion on the topic rather than which These are clear instructions that must be followed. After browsing the forums and listening to real people who give advice based on their own experience, I formed my own opinion and view on the question “Which gasoline is better 92 or 95? If you're interested, keep reading... If not, thanks for stopping by!
I’ll say right away that you shouldn’t fall for the above-mentioned English-language consoles; in most cases, this is just a marketing ploy for those who believe that after refueling their Zhiguli it will drive like a Mustang. Although there are also gas stations where “fashionable” gasoline, let’s call it that, lives up to its name, after refueling with such fuel, the car drives better and faster. But what is good for one engine is not always good for another. Therefore, the high octane number of “fashionable” gasoline in some cases can cause more harm than “diluted” 92nd.
The main differences between 92 and 95
These two brands of gasoline are most in demand by motorists; they certainly differ from each other, otherwise why would they be divided into two classes?
The first difference is the octane number. For 92, this number will be lower, but this does not mean that the quality of gasoline will be the same. The quality will still be normal, since the 92nd is generally considered purer among specialists compared to the 95th. The latter, by the way, if anyone didn’t know, is made from 92 by adding various additives and additives that increase the octane number; this method is considered legal when oil refineries do it. Although there are often cases when unscrupulous gas station operators or even their owners perform this operation themselves, thereby “cheating” the consumer. The quality of this 95 leaves much to be desired, but it is beneficial from a financial point of view for the gas stations themselves.
It is certainly necessary to adhere to the recommendations indicated in the owner's manual by the manufacturer of your car, but not everyone has this manual, this is especially true for used cars that are more than 10-15 years old. In addition, as we have already said, if the 95th is recommended for you, but you see and hear that the car drives better on the 92nd, and if you take into account the fact that the fuel “thinner” at gas stations, then I think that in this situation You can deviate from the rules.
If you are pursuing another goal, for example, and fill up with 92nd, knowing that the manufacturer of your car has clearly indicated that you need to fill up with 95th only because it is cheaper, then this is what you should think about. The fact is that the higher the octane number, the lower the ignition temperature of gasoline. Consequently, when refueling 92, you may, without knowing it, increase the ignition temperature of the fuel, which in itself is not good, because higher temperature conditions can cause failure of parts that are temperature dependent (pistons, valves, gaskets, seals etc.). I don’t think anything will happen from one or two refills, but if it becomes a habit and you deliberately fill yourself with 92nd, then whatever you say, unscheduled or some of its parts are guaranteed. That is why, if your car is equipped with 95, pouring 92 into the tank is strongly not recommended, at least when it comes to regular refueling.
What happens if you mix 92-1 and 95 gasoline?
According to socialists and motorists, it is impossible to mix the two types of fuel AI-92 and AI-95 because, despite the fact that both types of fuel belong to the same class, they almost do not mix with each other in the tank. This “mix,” according to some convinced “drivers,” allows you to save on fuel, but this is not the case. “Mixing” two types of fuel can harm the engine, since each fuel has its own density and if refueled in a ratio of one to one, AI-92 will sink to the bottom of the tank, and 95 will rise to the top. Ultimately, your engine will first run on 92 and then on 95, that is, you will get the effect described above when you drive 92, even though the manufacturer clearly instructed you to use 95.
If the engine of your car must consume 92 gasoline or higher, then in principle you can pour 5 gasoline without much harm, you should not suffer much because of this, moreover, according to motorists and experienced car enthusiasts, traction and engine performance improves .
Let's sum it up
If you don't know which gasoline is better 92 or 95, pour into the tank what the car manufacturer recommends, but if the manufacturer indicated that you can use AI-95 or AI-92, do as you please, pour in what you like best from a financial point of view.
If you are faced with the fact that you have zero fuel, and there is only a 92 nearby, but only a 95 is suitable for you, then it is better not to risk it, unless in case of emergency.
If you always fill up with 92, but there is no such gasoline at the gas station, you can safely pour in 95, there will be no harm from such a one-time fill-up. If, while driving the 95, you liked the performance of the engine and the dynamics of the car, in other words, you are thinking about switching to new gasoline with a higher octane number, consult with the dealer of your car manufacturer or at least with motorists. Be attentive and careful because in some cases the 95th filled in instead of the 2nd leads to engine malfunction and valves appear.
That's all for me, I hope I answered your questions, and now you know exactly the answer to the questions which gasoline is better 92 or 95 and is it possible to mix fuel of different brands? Thanks to those who made it through the article to the end, and even greater thanks to those who complemented me or liked it using the buttons below. Peace to all, and see you again on .
Only the one recommended by the factory that manufactured your car. Its type is indicated in the booklet supplied with the car, as well as on the back of the gas tank flap. Experiments are not needed here: after all, each engine is calibrated for a specific type of gasoline. But microprocessors and other electronic gadgets are far from omnipotent: they will not force an engine designed for Premium to digest low-octane Normal.
What will happen? Under sharp accelerations and heavy loads, the knock sensor (who has one) will constantly work, and this leads to unstable engine operation - the car jerks and loses dynamics. And if there is no knock sensor, then there may be problems with engine overheating and premature wear, or even burnout of the cylinder block gasket, destruction of pistons and valves. In addition, fuel consumption will increase slightly.
Finally, the strongest argument is the guarantee! If you really started putting the hell out of the tank, and then came with complaints, then at the warranty service, if a controversial situation arises, they will take a sample of gasoline from the tank, after which, with a clear conscience, they will offer you paid repairs. And they will be right.
As a temporary measure, you can allow the use of 92 instead of 95 - if there is no other at the gas station, but you need to go. But there’s no point in frolicking about it. However, everything is heading towards the fact that there will be no 92nd soon. And I’m tired of the talk about how 95 is always worse than 92.
Is it worth using Ultimate gasoline if regular gasoline is available?
I'm convinced it's worth it. I only fill my car with Ultimate and other Ecto. But not at all because someone’s stupid advertisement promised ten percent fuel savings - in practice this cannot be. It’s just that gasolines with such prefixes in the name have increased cleaning power and constantly remove all sorts of rubbish from the fuel system. We have repeatedly tested this in examinations - yes, it works! Therefore, if you take a dirty engine and start “washing” it with such fuel, then after a while it will really gain power and become more economical. But in no case is it better than the same engine, which was already clean.
Is it worth using 98 gasoline to make the car fly?
Even if you forget about the price difference, it’s still not worth it. Super gasolines have their own specific area of application - these are highly accelerated, supercharged engines that require high detonation resistance of the fuel. And there is simply no need to pour such gasoline into a regular, ordinary engine. Moreover, with normal, standard adjustments, the consumption on the 98th will be higher, and in most cases you can lose in power. The fact is that the technology for producing 98 is often based on the use of a fairly large addition of high-octane components with low calorific value - which means that the overall “calorie content” of the fuel will decrease.
Is it possible to determine the lack of quality by the appearance of gasoline?
Not always. Normal factory gasoline, without excessive content of bad octane-boosting additives, is either practically colorless or has a faint yellowish or bluish color. But gasoline with a reddish tint should immediately alert you. This color is given by metal-containing additives based on ferrocene or manganese. In addition, the excessive content of octane-increasing additives based on monomethylaniline (MMA) in gasoline gives the gasoline a rich yellow color and a sharp, nauseating odor, which then causes headaches.
Do we sell imported gasoline?
Complex issue. Such things are usually not advertised. According to my information, Norwegian gasoline StatOil, as well as Neste 98, are imported to the North-West. But in any case, you need to understand that they will not make the machine faster or more economical. The more gasoline is “focused” on the environment, the less attention is paid to efficiency - the combination does not work.
Why is it necessary to separate gasoline according to European standards and classes?
There are no gasolines according to European specification standards in Russia and there never were. The “Euro” signs at some gas stations are PR. The seller wants to call his product a big name - and he calls it names. Even Euro-7, or Pupkin Gasoline. Unfortunately, this is his right. But in fact, in the Russian Federation, fuels are divided only by class. These standards are similar to European ones, and yet they are slightly different. A detailed comparison of the two documents was in ZR, 2013, No. 6.
The vehicle description requires fuel according to EN 228. Where can I get it?
There is no answer to this question. From a formal point of view, “Mazda drivers”, “Volvolubs”, “naughty guys” and “Ford drivers” constantly violate the rules of operation of their cars by filling in fuel that does not formally comply with these same EN 228. We can only hope that our classes are no worse than their “Euro” ones. We write constantly about the reasons that a Russian cannot behave like a European. In fact, officials completely destroyed the fuel quality control system.
What to do if the environmental classes of the car and the fuel are different?
You can’t spoil the porridge with oil: using fuel of a higher class than specified in the PTS is absolutely safe. But reverse replacement is permissible only as a necessary measure. True, Nissan specialists believe that a few refuelings will not do any harm, but colleagues from the Dmitrovsky training ground shake their heads: they say, there is no need to play these games. VAZ workers say that their cars can be filled with gasoline from the 3rd to the 5th class.
Unfortunately, at many gas stations the class is not indicated at all. There is nothing written on the column, and not everyone wants to rummage through papers. And, in general, there is zero trust in these pieces of paper. To reassure yourself, you can look at the paid check - does it even say something like “Class-4”? Well, for complete reassurance, I will quote a famous St. Petersburg professor: “The engine quickly and confidently kills not someone else’s environmental class, but its composition. Which, by the way, is what distinguishes high-quality gasoline from nonsense, which is easy to play with.”
The simplest advice is this: refuel exclusively at branded gas stations - BP, Shell, Gazpromneft, Tatneft, Rosneft, Neste, Lukoil, etc. Bright signs, shops and other attributes of civilization. It happens, of course, that at the same Lukoil it suddenly turns out that it is not Lukoil, but it is unclear who, since the check is issued by some LLC or OJSC, but in general these are exceptions. Beware of gas stations painted “to match the brand” and called almost the same - roughly speaking, not BP, but RV, or “Likoil”, not “Lukoil”. Never fill up with junk, the cost of which is several rubles lower than at the neighboring branded gas station. Once we bought such fuel for examination - the car stank through and through, and instead of 95, the canister contained disgusting 80...
I think many people ask this question in the vast expanses of Russian roads. What kind of gasoline is better to pour into your iron horse, 92 or 95? Is there a critical difference between them, and what will happen if you use 92 gasoline instead of 95? After all, it is about 5 - 10% cheaper, and therefore there will be real savings from each tank! BUT is it worth doing this and isn’t it dangerous for your power unit? Let’s break it down piece by piece, there will be a video version and voting at the end...
At the very beginning, I propose to think about what these numbers are, 80, 92, 95, and in Soviet times also 93? Ever wondered? It's all just the octane number. Then what is it? Read on.
Octane number of gasoline
The octane number of gasoline is an indicator characterizing the detonation resistance of the fuel, that is, the amount of the fuel’s ability to resist self-ignition during compression for internal combustion engines. That is, in simple words, the higher the “octane level” of the fuel, the less likely it is for the fuel to spontaneously ignite during compression. In such a study, fuel levels are differentiated according to this indicator. Research is carried out on a single-cylinder installation with a variable level of fuel compression (they are called UIT-65 or UIT-85).
The units operate at 600 rpm, air and mixture are 52 degrees Celsius, and the ignition timing is about 13 degrees. After such tests, the RON (research octane number) is derived. This study should show how gasoline will behave under minimal and medium loads.
At maximum fuel loads, there is another experiment that deduces (ROM - motor octane number). Tests are carried out on this single-cylinder installation, only the speed is 900 rpm, the air and mixture temperature is 149 degrees Celsius. NMO has a lower value than OCHI. During the experiment, the level of maximum loads is displayed, for example, during throttle acceleration or when driving uphill.
Now I think it has become at least a little clear what it is. And how it is defined.
Now let's get back to the choice - 92 or 95. Any type, be it 92 or 95, or even 80. When processed at the factory, it does not have such a final octane number. With direct distillation of oil, it turns out only 42 - 58. That is, very low quality. “How can this be,” you ask? Is it really impossible to distill immediately with a high rate? It is possible, but it is very expensive. A liter of such fuel would cost several times more than those currently on the market. The production of such fuel is called catalytic reforming. Only 40 - 50% of the total mass is produced in this way and mainly in Western countries. In Russia, much less gasoline is produced this way. The second production technology, which is less expensive, is called catalytic cracking or hydrocracking. Gasoline with this treatment has an octane number of only 82-85. In order to bring it to the desired level, you need to add special additives to it.
Gasoline additives
1) Additives based on metal-containing compounds. For example, on tetraethyl lead. Conventionally, they are called leaded gasoline. Very efficient, they make the fuel work, as they say. But also very harmful. As can be seen from the name tetraethyl lead, it contains a metal – “lead”. When burned, it forms gaseous lead compounds in the air, which is very harmful, settles in the lungs, developing complex diseases, such as “CANCER”. Therefore, these types are now banned all over the world. In the USSR there was a grade called AI-93, which was based on tetraethyl lead. We can conditionally call this fuel obsolete and harmful.
2) More advanced and safer based on ferrocene, nickel, manganese, but monomethylaniline (MMNA) is most often used, its octane number reaches 278 points. These additives are mixed directly with gasoline, bringing the mixture to the desired consistency. But such additives are also not ideal; they form deposits on pistons, spark plugs, clog catalysts and all kinds of sensors. Therefore, sooner or later, such fuel will clog the engine, in the literal sense of the word.
3) Latest and the most perfect are ethers and alcohols. The most environmentally friendly and do not harm the environment. But there are also disadvantages of such fuel, this is the low octane number of alcohols and ethers, the maximum value is 120 points. Therefore, the fuel requires quite a lot of such additives, about 10 - 20%. Another drawback is the aggressiveness of alcohol and ether additives; with high contents, they quickly corrode rubber and plastic pipes and sensors. Therefore, such additives are limited to 15% of the total fuel level.
Compression ratio and the modern car
Actually, why I started talking about the octane number and additives, because it is necessary to take into account the self-ignition of the fuel or the so-called detonation in modern units.
The fact is that manufacturers, in order to increase power and reduce fuel consumption, slightly increase the compression ratio in the engine cylinders.
Here's some useful information:
- For compression ratios up to 10.5 and below, the octane number of gasoline is AI - 92 (we do not take into account TURBO engine options).
- From the 10.5 to 12 mark - fill in fuel not lower than AI - 95!
- If the compression ratio is 12 or higher, then it is recommended to fill in at least AI - 98
- Of course, there are also very rare gasolines, such as AI-102 and AI-109, for which the compression ratio is 14 and 16, respectively.
So what will happen IN THEORY , if we pour 92 gasoline into an engine that is designed for 95? YES, everything is simple, fuel from a high compression ratio will self-ignite, “mini-explosions” will occur - that is, the destructive effect of detonation will manifest itself!
Why is detonation dangerous? Yes, everything is simple, burnout of the gasket between the head of the block and the block itself, destruction of the rings (both compression and oil control), burnout of the pistons, etc.
BUT it’s like I wrote above - IT'S ALL IN THEORY ! ESPECIALLY IN RUSSIA! Why am I saying this? Many manufacturers have realized that it is VERY DIFFICULT to find high-quality gasoline (and now we are talking about the 95 version), if possible, even in metropolitan regions (I’m already silent about small cities). Gasoline is often bottlenecked so that it is impossible to achieve an octane rating of 95. I remember a couple of years ago, I read an article with an experiment - where in the capital they took samples from a large number of gas stations, and only in 20 - 25% of cases the gasoline was close to the standards, the rest were far from the figure 95 and even 92. Just think about it! How can you check the quality yourself? That's right - NO way.
So if you fill in such low-quality fuel, will the engine immediately shut down? Straightaway? Not certainly in that way. Cars are smart now, and to prevent your engine from going haywire, a knock sensor was invented; it allows the engine to operate with a different octane number. It monitors the mechanical vibrations of the engine block, converts them into electrical impulses and constantly.
If the pulses “go beyond the normal state,” then the ECU makes a decision to adjust the ignition angle and the quality of the fuel mixture. Thus, a modern engine designed for 95 gasoline will run smoothly even on 92.
However! Such work will be successful at low and medium speeds; at high speeds (almost maximum), the knock sensor does not work so effectively, so “frying” with a low-octane mixture is UNDESIRABLE!
Let's summarize.
What happens if you fill in 92 instead of 95?
In fact, the difference between 92 and 95 gasoline is minimal, only “3 numbers.” If you refuel in a company that guarantees you exactly “hard indicators”, that is, “92 is 92”, and “95 is 95” and YOU WILL BE SURE OF THIS. The difference will appear for your engine at high speeds, and not in a significant (up to 2 - 3%) loss of power, and fuel consumption will also increase by this percentage.
And what’s most interesting is that if you don’t often spin your power unit to 5000 - 7000 rpm, but move from 2000 to 4000, then 92 will not give you any negative aspects. Still, the electronics will regulate everything itself.
Prejudice - there is no such thing. Burnout of valves was typical for leaded types that had metal additives. High-octane leaded gasoline could harm an engine configured to use AI-76 (and it did not have electronic correction of the ignition angle and fuel injection). But now there is simply no such danger, because such fuel has long been prohibited.
BUT IDEAL! You need to fill with the exact fuel recommended by your manufacturer. After all, if suddenly a new engine breaks down, and it turns out that the breakdown is related to gasoline, then you will end up with very expensive repairs, AND AT YOUR OWN EXPENSE. Saving 10% on gasoline will hurt you.
What final result you want to get - to each his own, if your engine is not designed for the 92nd, then you shouldn’t drain it! Still, it can be fraught! However, if you fill it up, a modern engine will automatically adjust the ignition angles and you may not even feel the fuel change (that is, you can drive the 92 without revving your engine to the maximum). But if a breakdown occurs, and the warranty reveals that the wrong fuel was filled, REPAIRS WILL BE AT YOUR EXPENSE! And this, for sure, is not worth the 2–3 rubles saved per liter.
Now let's watch the detailed video version.
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votes, average: 4,24
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The question of which gasoline is better to refuel with, 92 or 95, does not look either rhetorical or inappropriate for the average domestic car owner. Of course, the quality of gasoline at Russian gas stations still leaves much to be desired, especially in the outback, where control is minimal, and as a result, they can mix anything into the fuel (and then you clean my gas tank and clean the engine). But the problem with full and high-quality refueling of the car is not limited to this.
Some have quite old cars with mileage, others have brand new, showroom-only cars. Accordingly, engines differ in nutritional preferences. And if with zero cars everything is more or less clear: fill in what is recommended by the manufacturer in technical support, and the engine will live happily ever after, then with used cars not everything is so clear.
Firstly, older cars may simply not have so-called books with technical recommendations; secondly, the previous owner could have reconstructed the engine or adapted it for a different type of fuel. No matter how to harm an engine that has already passed tens of thousands of kilometers!
Which gasoline is better to refuel 92 or 95, of course, is up to each car enthusiast to decide for himself. Some are trying to save money by filling in the cheaper 92nd, and some even manage to mix different types of fuel or add additives offered in a large assortment by various manufacturers, promising almost the eighth wonder of the world that should happen to your engine when they are running. adding.
By the way, according to real experts, 80 percent of newfangled products are advertising gimmicks and can even cause harm if used ineptly. So even an experienced motorist needs to be as careful as possible with this. And, in addition, it is still necessary to know the main differences between the 92 and the 95, so that you do not have to unscheduled repair the engine unit.
Main differences
These two most popular brands are, of course, different from each other. Well, firstly, the octane number. But you shouldn’t think badly of the 92: after all, some drivers believe that the 95, compared to the 92, is of higher quality and will certainly not be able to deal a sneaky blow to your engine. But it is not so. Quite the contrary, higher gasoline is, as a rule, made on the basis of lower gasoline by adding various additives to it that increase the octane number. That is why 92nd gasoline is considered by experts to be cleaner than its highest relatives (95 and 98th).
Roughly speaking, it is cleaner because there are fewer additives (although some gas stations also sell 92 produced by additives). And bringing it to the level of 95 is cheaper for gas stations than purchasing the corresponding product directly from the factory. So they add more, increasing the octane number. Moreover, this homemade product can be very dangerous for the engine and lead to its premature failure.
If, according to the passport, the engine is intended for 95, then some strive to fill it with 92 or a mixture of these two types in order to save money. In this case, over time, a problem arises for the motor, and for purely physical reasons. According to the laws of this science-physics, the higher the octane number, the lower the temperature at which gasoline burns. But when using low-octane gasoline as fuel, the opposite happens. The temperature rises to levels unplanned by the manufacturer.
This leads to the fact that some spare parts can simply burn out, because they are not designed for such executions (especially if refueling with reduced gasoline occurs more or less regularly). And then unscheduled - partial or complete - repair of the engine is provided after a certain, not too long, time. So in cars clearly designed for 95 and above, the use of 92 type of fuel is not recommended. This is fraught, be careful and attentive.
What if you mix it?
It is also impossible, according to experts, to mix 92 and 95, since they do not even mix completely in the tank. With a mix of 95+92, as many believe, there is a saving in price. But you can also cause some harm to your engine, designed for 95 and above. This will happen because these two gasolines have different densities. If they are poured in a ratio of 50 to 50, then 92 will sink to the bottom of the tank, and 95 will rise to the top. This way you will use one first, then the other - they almost won't mix! And again, we return to what was said above about the harm of ’92.
But if your car is designed for 92 and higher, then, as experts say, you can fill the tank with 95 with peace of mind. This will not harm the engine, and perhaps even improve throttle response and revving. At least you will feel more confident when overtaking!
