Tractor fuel. Synonym: tractor kerosene. Kerosene is a heavier fraction of the distillation of crude oil than gasoline, which will distill at temperature 200 do 300°C. Kerosene has a low octane number, which causes difficulties in starting normal car engines, carburetor (low pressure). Kerosene-driven engines must have special heating devices, which make kerosene vapor. These engines are initially started with gasoline, and only after the kerosene is heated to the correct temperature, it is switched to the petroleum drive. More important properties: c. on. 0,825—0,860, upper calorific value 10 400 cal, octane number of pure kerosene 30, with an admixture of benzene 37. It is an anhydrous liquid, transparent, yellowish color. It should not be cloudy and must not contain any suspended particles. The quality of tractor kerosene is assessed on the basis of the octane number, caloric value, volatility, freezing point, sulfur content, cleanliness. Tractor diesel (unrefined) they have aromatic hydrocarbons, valuable in terms of anti-detonation; these hydrocarbons contribute to increasing the octane number of the fuel. Tractor kerosene is used to drive low-pressure tractor engines (carburetor). Packaging: galvanized iron cisterns or barrels inside, marked with "Kerosene tract.”.