Automotive fuels are: motor gasoline and gasoline-synthetic fuel blends, aromatic or spirit and ethyl. Polish standards allow for three types of car fuels marked with numbers 1, 2 and 3. Car fuel type 1 it is gasoline mixed with synthetic fuels (motor gasoline). Car fuel type 2 it is a type of automotive fuel 1 with the addition of benzene (BB mix). Car fuel type 3 it is a type of automotive fuel 1 or 2 with the addition of ethyl liquid with a strictly defined composition (ethyline). Besides these three types of fuel, defined by the Polish standard, There are two further types on the market, namely the mixtures of BA and BAB, which, under certain conditions, serve the same purposes, what fuel type 2 (BB mix). Automotive fuels are used to drive carburetor and injection ignition engines, spark plug, except for aircraft engines. In particular (especially BAB) they apply to: 1) motor vehicles such as: passenger and sanitary cars (average wear rate 12,9 l on 100 km mileage), lorries (average wear rate 32,64 l on 100 km mileage), employee buses (average wear norm 33,7 l on 100 km mileage), special cars (average wear rate 49,67 l on 100 km mileage), motorcycles (average wear rate 2;9 l on 100 km mileage) ; 2) construction equipment, normally running on diesel fuel (diesel engines) a with starting motors, requiring gasoline or a mixture; they are excavators, bulldozers, air compressors, electric welders powered by combustion engines; 3) construction equipment with only gasoline or carburetor engines, demanding mixtures, how: smaller concrete mixers with a capacity 200, 250, 400— 1 000 l, self-propelled wheeled cranes (power 60 MILES), killers. Automotive fuels should be transparent, they should not contain suspensions, they should not be cloudy or stratified. Fuel type 3 (ethyline) it must be tinted (not yellow).