Cleaned aircraft engine component

Aviation used-oil evaluation – Trend analysis

Used oil limits for viscosity, TAN, water and metals content are established by the engine OEM and can differ by engine model and service. Always consult with the OEM for advice on used oil limits and appropriate actions.

Most engines operating satisfactorily produce wear metal levels close to zero. Metals analysis, oil parameters, phosphorus measurements and engine parameters are all essential to assess the operating condition of both the jet engine oil system and the oil.

To learn more, please download the full technical topic below.

Format :
351 kb File in English
Posted :
Category :
Technical topics
  • A380 taking off at night

    Products and services

    ExxonMobil aviation offers customers a unique nose-to-tail solution. Whether it is fuels or lubricants, we have an option for your entire commercial, general or military fleet.

  • Boeing 787 plane landing at night

    About us

    Tested and proven in the aviation business for more than a century. We are committed to the aviation industry and want to be your trusted supplier of choice.

  • 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.