9621 Agnes Crossing, Lake Suzanneview, New Mexico Island 84604-9295.
It seems that everyone has known everything about motor fuel for a long time, and you will not surprise an advanced driver with something new. Nevertheless, the AvtoVzglyad
To explain the processes in a car’s fuel system and engine, you need to remember a little bit of the basics, so to speak. The vast majority of petrol cars operating on Russian roads consume AI-95 and/or AI-92 fuel, the numbers indicating the octane number of a particular brand of fuel. The higher it is, the less the fuel is prone to explosion – an explosion during combustion in the engine cylinders.
Most European and Asian car manufacturers advised domestic drivers to use only AI-95 just in case. In the strange hope that it is a priori of better quality and less harmful to the engine than AI-92.
Whether this is really so is the tenth issue in the case now under consideration. We are interested in a slightly different aspect of the octane rating issue. The bottom line is that almost any fuel of this type is obtained by adding special additives to the oil fraction obtained at the refinery, increasing the octane number to the desired level.
In Russia, methyl tert-butyl ether (MTBE) is widely used for this purpose. To help the reader “feel the scale”, let’s say that AI-95, which he pours into his car’s gas tank at gas stations, contains a lot of MTBE additives – about 10%.
This fact suddenly becomes important when one finds out that this ether boils at a temperature of only 55°C above zero. Sufficiently intense evaporation already takes place at 30ºС. And now remember how much the car body sometimes heats up under the influence of sunlight in the summer. And ask yourself: where does our MTBE end up under such circumstances?
The correct answer is that almost everything leaves gasoline in pairs. And they will escape into the atmosphere, either through the gas tank vent, or when we open the neck while refueling at a gas station. Did you hear the characteristic hiss at such times? This is a free-flight additive, which is supposed to provide 95 octane fuel. After that, AI-92 splashes into the tank instead of at its best. Or even less “octane” fuel. And these physics and chemistry absolutely do not care about the recommendations of car manufacturers for the quality of gasoline that “comes” into your car.
The following conclusions can be drawn from the above. First, try not to leave the car in the sun to minimize the evaporation of MTBE. Second, keep the gas tank as full as possible – so that the additive has nowhere to physically evaporate. And the third: calmly pour at least the 95th, at least the 92nd gasoline into your car. In any case, in the heat, the actual octane number will soon become noticeably lower than at the time of refueling. How much exactly only the sun knows.
To explain the processes in a car’s fuel system and engine, you need to remember a little bit of the basics, so to speak. The vast majority of petrol cars operating on Russian roads consume AI-95 and/or AI-92 fuel, the numbers indicating the octane number of a particular brand of fuel. The higher it is, the less the fuel is prone to explosion – an explosion during combustion in the engine cylinders.
Most European and Asian car manufacturers advised domestic drivers to use only AI-95 just in case. In the strange hope that it is a priori of better quality and less harmful to the engine than AI-92.
Whether this is really so is the tenth issue in the case now under consideration. We are interested in a slightly different aspect of the octane rating issue. The bottom line is that almost any fuel of this type is obtained by adding special additives to the oil fraction obtained at the refinery, increasing the octane number to the desired level.
In Russia, methyl tert-butyl ether (MTBE) is widely used for this purpose. To help the reader “feel the scale”, let’s say that AI-95, which he pours into his car’s gas tank at gas stations, contains a lot of MTBE additives – about 10%.
This fact suddenly becomes important when one finds out that this ether boils at a temperature of only 55°C above zero. Sufficiently intense evaporation already takes place at 30ºС. And now remember how much the car body sometimes heats up under the influence of sunlight in the summer. And ask yourself: where does our MTBE end up under such circumstances?
The correct answer is that almost everything leaves gasoline in pairs. And they will escape into the atmosphere, either through the gas tank vent, or when we open the neck while refueling at a gas station. Did you hear the characteristic hiss at such times? This is a free-flight additive, which is supposed to provide 95 octane fuel. After that, AI-92 splashes into the tank instead of at its best. Or even less “octane” fuel. And these physics and chemistry absolutely do not care about the recommendations of car manufacturers for the quality of gasoline that “comes” into your car.
The following conclusions can be drawn from the above. First, try not to leave the car in the sun to minimize the evaporation of MTBE. Second, keep the gas tank as full as possible – so that the additive has nowhere to physically evaporate. And the third: calmly pour at least the 95th, at least the 92nd gasoline into your car. In any case, in the heat, the actual octane number will soon become noticeably lower than at the time of refueling. And how much exactly only the sun knows.
Source: Avto Vzglyad
Donald Salinas is an experienced automobile journalist and writer for Div Bracket. He brings his readers the latest news and developments from the world of automobiles, offering a unique and knowledgeable perspective on the latest trends and innovations in the automotive industry.
