Naphtha is a light fraction of petroleum used to make gasoline . Naphtha also produces solvents and feedstocks for the petrochemical industry . Kerosene was the first important petroleum fraction , replacing whale oils in lamps over a hundred years ago. Some unscrupulous refiners failed to distill off all the naphtha from the kerosene fraction thereby increasing the volume of their final product. This lead to many lamp explosions and fires .
Diesel fuels find use in the fleet of trucks which transport the nations goods .
They are therefore more efficient . It is also interesting to note that diesel engines have no spark plugs , instead the fuel-air mixture is ignited by the rising temperatures and pressures during the compression stroke . In the winter refineries produce more gas oil , whereas during the summer driving months they produce more gasoline . Heavy Fuel Oil is often blended with gas oils for easier use in industry. Ships burn heavy fuel oils but they call it bunker oil .