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Petroleum diesel, also called petro diesel, or fossil diesel is produced from petroleum and is a hydrocarbon mixture, obtained in the fractional distillation of crude oil between 200 °C and 350 °C at atmospheric pressure. Diesel is generally simpler to refine from petroleum than gasoline.

Jet fuels are sometimes classified as kerosene or naphtha-type. Kerosene-type fuels include Jet A, Jet A1, JP-5 and JP-8. Naphtha-type jet fuels, sometimes referred to as "wide-cut" jet fuel, include Jet B and JP-4. Fuel for a piston-engine powered aircraft (usually a high-octane gasoline known as Avgas) has a low flash point to improve its ignition characteristics.