At some gas stations, you may not be refilled with a whole liter of gasoline. It turns out that you have to somehow prove that you were really deceived. The simplest thing is to take a canister, buy it directly from the store when refueling, and fill it with 10 or 20 liters. The important thing is that there is a level in any canister. At this level, you should be poured fuel. If less fuel has gone in, then, accordingly, you can make a scandal.
Motorists are ready for anything, just to refuel with high-quality gasoline. For this reason, I would like to point out that free cheese only happens in a mousetrap. You know, there are often gas stations that gladly give you discounts, or special cards on which you accumulate points. Trust that virtually all of these gas stations make money from you. One liter of underfilled gasoline is about 30 rubles. It turns out that from one filled tank, you can be deceived by 100-200 rubles. By the way, there can be no deception with gas, since all motorists fill up the cylinders when they are completely empty. You can check whether you are being deceived or not by arriving at a gas station with an almost empty tank. Alternatively, ask to be filled to a full tank. For each car, in the technical passport it is written what the tank capacity is.
If you were poured more than 50 or 60 liters, then you were deceived. It will not be difficult to prove your case, but on the other hand, what is the benefit to you? You will only be able to prove that it is no longer worth refueling your car at this gas station. Perhaps your scandal will be seen by the people around you. But, if you notice that you are probably being deceived, just change the gas station. Even in small towns, there can be several dozen gas stations. The most important thing is that gasoline is of high quality, and everything else is little things. In addition, the price of fuel can vary by several kopecks. Yes, for 10 liters it will be 1-10 rubles. But, will they play such a big role?
