People are often using such vessels for the storage of fuel and production of mixtures that are not intended for it; for example, cans where window washing liquid, disinfection liquids, etc. have been kept before.
However, it is not always possible to pour out the previous liquid completely and a couple of milligrams of it may remain in the can. When we pour fuel into such an incompletely dry vessel, different chemical processes start forming that are especially harmful for engine operation (carburettor membranes deform, carburettor valves become tarnished, working temperature in cylinder increases, etc.) and thus the possibility of irregular engine operation and faster overheating increases.
Considering that fuel may react with the material the tare is produced from, the same can happen to fuel and fuel mixtures that are filled in plastic vessels intended for food products (mineral water, plant oil, etc. bottles). Based on the above, we recommend using vessels and cans specially intended for fuel.
We want to remind again that fuel, especially fuel already mixed with oil, may be stored for not more than 2-3 weeks (fuel loses its chemical properties in chemical reaction processes); in the event of the contrary, there is a large probability of the engine overheating, as a result of which the repair of the machinery may cost several hundred euros. We recommend purchasing fuel in filling stations with large customer flow; thus, there is a larger probability that fuel will have been in the tanks of such filling station for a shorter period.