THE BEECHMONT CREST AUTOMOTIVE LEARNING ZONE
DIESEL FUEL
Diesel fuel is the second most common type of fuel used in automobiles. Automobiles that run on diesel include the diesel Jetta and the diesel Touareg, both made by Volkswagen.
Diesel fuel differs from gasoline in some significant ways. Diesel is a thicker fraction of crude oil, and it contains more energy per unit. Diesel is thicker than gasoline, and requires a high-pressure injection system.
There are three grades of diesel fuel: No 1, No. 2, and No. 4. No. 2 diesel has a medium viscosity, and is normally used for diesel automobiles. The thinner No. 1 diesel is sometimes used for diesel engines during cold weather. (In cold weather, diesel fuel becomes thicker, often leading to difficulties with engine ignition.)