Cleaned aircraft engine

Jet engine oil consumption factors

Engine designers strive for balance in oil consumption rates. Too much consumption is costly to operators and usually requires larger oil tanks, which add unwanted weight. Too little consumption can adversely affect oil condition, system cleanliness and engine longevity.

Explore the two key factors of oil consumption, as well as how engine system oil degradation manifests.

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Technical topics

  • Inside view of an aircraft gas turbine engine

    Jet engine oil system, part 1

    International air regulations require that each engine is equipped with a self-contained oil system capable of providing continuous oil flow to the engine. Visit the page to find out more.

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  • Disassembled jet engine parts

    Jet engine oil system, part 2

    Main engine shafts are supported by bearings in certain strategic places, depending on the load on the shafts and the length of the engine. Visit the page to find out more.

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  • Blue sky view from the side of a plane


    Find answers to general ExxonMobil aviation questions or explore our other FAQ pages about jet turbine oils, hydraulic fluids, piston engine oils, greases and gear oils.

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