Gasoline varieties are constantly updated, new types of fuel are being developed, which have some other properties and quality. Experts told that what you need to know about gasoline, dispelled popular myths and answered frequent questions.
The quality of gasoline can be checked in its color.
Until now, there are stories among motorists that the quality of gasoline can be determined by its appearance. Indeed, in the Soviet years, gasoline varieties differed in color to reduce the possibility of illegal manipulations. However, now all the varieties look equally. With the transition to Euro5, the AI-92 fuel is not different from AI-98 or in color or by smell.
Although a rough way to assess the quality of gasoline is still. It can be determined to the touch. Clean gasoline dries skin, and with an admixture of diesel fuel (DT) - greasy. Meanwhile, this method does not work for determining counterfeit gasoline.
A more accurate quality assessment can be made using a portable indicator of the quality of gasoline OKTIS-2.
According to the requirements of GOST, modern gasoline may contain dyes of any colors, except green and blue. Accordingly, the practice of tinting gasoline still takes place, but exclusively for marking a branded product and identifying fakes. A perisure must be a precipitate in fuel, too dark or almost brown.
Mixing gasoline with different Och is fraught with bundle of the mixture
Often you can hear such an assertion that if you mix the gasoline of the AI-92 and AI-98 brand, then in fact the fuel is not mixed. Due to the different density of AI-98, allegedly will be collected, relatively speaking, on the surface of the 92th fuel. As a result, when the 98th gasoline is unworn, the detonation engine resistance to the low-oxide residue will decrease, and this will cause detonation and an increased load on the power unit. Such an approval is the myth. As for the possible bundle, the requirements of the standard for gasoline density are one: it must be in the range of 725 - 780 kg / m3 at 15 ° C. No commodity gasoline is out of these limits. Therefore, the bundles when mixed them, especially in conditions of vibration, will not. Therefore, if mixed in equal proportions AI-92 and AI-98, we obtain essentially an analogue of the 95th fuel. To work the engine, this manipulation will not affect.Octane number speaks about the quality of gasoline
You can also find the opinion that cheaper fuel Marie AI-92 is distinguished by low quality, since it is intended for unpretentious engines. Such statements are incorrect and refuted by the modern combustible production process. In fact, the maximum octane number that gasoline receives after cracking has a value of 80. For the subsequent increase in the octane number, a different set of additives - compositions with alkyls, ethers, alcohols, elements that increase the stability of fuel to freezing are used. As a result, the octane number increases to 92, 95, 98 and 100. In other words, the fuel with a different octane number is one, the overall basis.
On the gas station of the famous brand is always good gasoline
In most cases, the quality of fuel on the well-known network gas stations is really high. However, there are many exceptions that are associated in most cases with the practice of franchising. The fact is that the right to sell fuel under an advertised brand can acquire any small firm that is enough to conclude a contract with the company of Upper Echelon. Therefore, there are no rare cases when gasoline from the head company is diluted with poor-quality fuels, and the octane number of such a "mixture" is raised by additives.Fuel is not aging
Easy to store the fuel does not make sense, as it has a shelf life. According to modern standards, the warranty period for storing automotive gasoline of all brands is 1 year from the date of manufacture of fuel. At the same time, the rate of gasoline degradation depends on the temperature: the higher the temperature, the fuel spoils faster. Also, the quality of gasoline worsens faster on contact with air and metals. It turns out that faster than gasoline loses its properties in the car's fuel tank. From here we get the real maximum fuel storage period - half a year.
Gasoline does not freeze
There is an opinion that, in contrast to diesel fuel, gasoline does not freeze and any frosts are nicking. However, this is not quite true. Gradually, water condensate accumulates in the tank, which goes down to the bottom of the gas tank and accumulates the recess in front of the fuel pump. Then, it is absorbed into the fuel feed system in the form of a mixture and evaporates in combustion chambers. After turning off the power unit, part of the fuel remains in the highways, in the filter and in the pump. During severe frosts, water is stratified, turns into a grain of inlet inside the liquid and crystallizes, clogging the passage for gasoline. As a result, the car stalls. So that water does not accumulate in the gas tank, you can use special chemicals that are added to the fuel. They dissolve water in themselves and do not give it to freeze. You can also use food ethyl alcohol for these purposes.
With an accident, gasoline in the tank can explode
This scenario can be seen in the cinema, but in real life it is almost impossible. As you know, the explosion provokes a mixture of gasoline steam with air. Meanwhile, the fuel system is sealed, and the likelihood of an explosion of the fuel tank is in no way connected with the amount of fuel poured into it. Another thing is to fire. When the fuel line is deployed and fuel from the hot collector or hot elements of the release system, a very likely fire that is difficult to pay off.