How to understand that fueled by low-quality fuel, and what to do

1. How to understand that you are fueled by low-quality fuel?

It will be difficult to make a mistake here: your car will tell you everything. Gasoline is bad if:
The car is badly started or does not start after refueling;
The car stalls for no apparent reason;
Idle speed swims and is unstable;
The engine does not pull, the dynamics of acceleration falls, and the response to the accelerator pedal is inhibited;
The car jerks when overclocked;
From the engine comes a metallic knock and extraneous noises — signs of detonation;
The exhaust has darkened — this indicates the appearance in it of soot and incomplete combustion of fuel;
Fuel consumption is unusually high.

It is worth mentioning and all kinds of «rapid tests», proposed for assessing the quality of fuel. So, it is usually said that gasoline should be transparent, and to assess it you need to drop it on a sheet of paper or on your hand and look at what’s left after it completely evaporates. If there is a greasy stain on the surface, black dots or other debris, this clearly shows that the gasoline is bad. All this is true, but only to carry out such a test before every refueling is simply impossible — as well as follow the advice to smell the fuel for the smell of sulfur. The smell coming from the tank with gasoline is so strong that you are unlikely to feel the sheer aroma of sulfur before you become sick from the inhaled fumes.

2. What to do if it became obvious that the gasoline that you poured in was bad?

First of all — rummage in the car and find a check from the gas station: this is your main and only proof in case of further proceedings. Give an unequivocal advice about the continuation of movement is impossible. Yes, under normal conditions, you should immediately stop, muffle the engine, call the tow truck and begin to eliminate the consequences of refueling and protect your rights. But if the frost outside the window, you have already driven off from refueling kilometers 50, and the nearest tow truck is in the regional center, then the risk of freezing on the road is much worse than a potential engine repair. However, continuing the movement, it is already worth understanding that you are doing it at your own peril and risk.

In the ideal case, you should act like this:
Stop traffic, muffle the engine and call the tow truck;
Return to the gas station and contact his management, presenting a check and explaining their claims;
Call an expert or a mobile laboratory for fuel analysis.

The incoming expert will take samples from your tank and the column where you refueled. The sample should be three: one for analysis, one for the gas station and one control, which can be checked if there are disagreements. If the result of the analysis confirms that the fuel was of poor quality, you should refund both the cost of the examination and the cost of eliminating the consequences of the unsuccessful refueling. True, this can be refunded both in pre-trial and in court.

3. What is fraught with refueling fuel poor quality?

The council immediately shut down the car and stop the traffic from the previous point — not an exaggeration at all. If you have a modern car, the consequences of riding on bad gasoline can be quite expensive. The first to suffer candles: they, by the way, are also an element of primary diagnostics. A raid on them — for example, red or black — indicates that the fuel is bad. The next element, directly suffering from the «palenki», is the fuel system: clogged filters (net on a gasoline pump) and fine cleaning, which increases the load on the gasoline pump and reduces its life. The injection system and sensors like the lambda probe are not very good. Another expensive detail, sensitive to the quality of fuel, is the catalyst. Well, among other things, arising when working on a bad fuel with a low octane number, detonation actively harms the cylinder-piston group, increasing the wear of the motor as a whole.

Low-quality gasoline is also dangerous because the consequences of its use are often not immediately apparent. So, a small amount of moisture can not cause serious deviations in the engine, but to provoke or aggravate the corrosion of the fuel system — quite. The increased sulfur content, which, as we said above, is almost impossible to determine «by sight», negatively affects the alu- minum and nickel-plated walls of the cylinders. Benzene and methanol, too, will not cause the engine to die down, but in the long run they will cause a small resource of the catalyst and corrosion in the fuel system. Therefore, choosing even a gas station «for every day», be as critical as possible in the assessment.

4. What to do with the car after refueling with bad fuel?

One obviously unsuccessful refueling will cost you dearly not only in case of a breakdown. To completely eliminate the consequences will have to do a lot of work:
Remove and rinse the fuel tank;
Flush the fuel line;
Clean the coarse filter on the gasoline pump;
Replace the fine filter fuel filter;
Check the cleanliness and correctness of the injectors;
Clean or replace the spark plugs;
Check the correctness of the fuel pump and the fuel pressure it gives.

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