Exxon Aviation Oil Elite™ 20W-50

Single propeller plane flying over mountains

Exxon Aviation Oil Elite™ 20W-50 is a premium quality, semi-synthetic, ashless-dispersant aviation piston engine oil. It is formulated from select, highly refined mineral base oils, a polyalphaolefin synthetic base oil, and ashless performance additives providing outstanding engine cleanliness, wear protection, and corrosion protection.

Exxon Aviation Oil Elite 20W-50 is designed to satisfy all opposed piston engine manufacturers’ requirements under a wide range of climatic conditions. It provides:

  • Excellent engine cleanliness
  • Outstanding protection against wear, rust and corrosion
  • Better cold-start protection and a stronger lubricant film in typical operating temperatures, compared to mono-grade oil
  • Compatibility with all commercial aviation piston-engine oils

Product information

Data sheets

Features and Benefits

Extensive laboratory, engine rig and flight evaluation tests have demonstrated the excellent performance of Exxon Aviation Oil Elite 20W-50. Key features and potential benefits include the following.



Advantages and Potential Benefits

High level of rust and corrosion protection

Extends the life of critical engine parts

Excellent wear protection

Long engine life

High oxidation and thermal stability

Minimizes deposits and extends engine life

Powerful dispersancy

Keeps engine parts, turbocharger bearings, propeller hub and dome, etc. clean of harmful sludge and varnish deposits

High Viscosity Index

Provides easy starting and fast lubrication of critical engine parts under low temperature conditions as well as high lubricant film strength and low wear under high temperature operating conditions

20W-50 Multi-grade

Year-round lubricant for most climates

Compatible with all commercial aviation piston engine oils - both non-dispersant and ashless dispersant type

Flexibility in use

Contains the Lycoming anti-wear/anti-scuffing additive

Compliance with FAA airworthiness directive AD 80-04-03-R2 par.b.1



Exxon Aviation Oil Elite 20W-50 is U.S. Military approved under SAE J1899, which replaced MIL-L-22851D and is listed in the U.S. Military Qualified Products List QPL-1899. It is approved by and included in the Qualified Products Lists of Teledyne Continental, and Textron Lycoming and it is designed to satisfy the requirements of all opposed piston engine manufacturers. It provides an alternate means of compliance with FAA AD 80-04-03-R2 par.b.1.


New or newly overhauled aircraft engines should be broken in according to the engine builder's recommended procedure. Many engine manufacturers advise running in on straight mineral oils for the first 25 to 50 hours of operation. In all cases, however, the engine manufacturers recommendations should be followed, since the run in procedure can vary from engine to engine.


Exxon Aviation Oil Elite is compatible with non-dispersant mineral oils as well as other ashless-dispersant oils that meet the requirements of MIL-L-22851D/SAE J1899. It can also be used in high-time engines that have previously used a straight mineral oil. In this case it is advisable to carry out the oil-screen inspection recommended by the engine manufacturer.


Specifications and Approvals

This product has the following approvals:

SAE J1899


This product meets or exceeds the requirements of:

Continental Motors, Inc.MHS 24

Textron Lycoming301F


Properties and Specifications




SAE 20W-50

Acid Number, mgKOH/g, ASTM D664


API Gravity, °API, ASTM D4052


Ash, mass%, ASTM D482


Cold-Cranking Simulator, Apparent Viscosity @ -15 C, mPa.s, ASTM D5293


Copper Strip Corrosion, 3 h, 100 C, Rating, ASTM D130


Copper Strip Corrosion, 3 h, 204 C, Rating, ASTM D130


Density @ 15.6 C, g/ml, ASTM D4052


Flash Point, Cleveland Open Cup, °C, ASTM D92


Foam, Sequence I, Stability, ml, ASTM D892


Foam, Sequence I, Tendency, ml, ASTM D892


Foam, Sequence II, Stability, ml, ASTM D892


Foam, Sequence II, Tendency, ml, ASTM D892


Foam, Sequence III, Stability, ml, ASTM D892


Foam, Sequence III, Tendency, ml, ASTM D892


Hi-Temp Hi-Shear Viscosity @ 150 C, mPa.s, ASTM D4683


Kinematic Viscosity @ 100 C, mm2/s, ASTM D445


Kinematic Viscosity @ 40 C, mm2/s, ASTM D445


Pour Point, °C, ASTM D97


Sulfur, mass%, ASTM D2622


Viscosity Index, ASTM D2270



Health and safety

Health and Safety recommendations for this product can be found on the Material Safety Data Sheet (MSDS) @ http://www.msds.exxonmobil.com/psims/psims.aspx

Teledyne Continental
Textron Lycoming
  • Wear protection
  • Corrosion protection
  • Rust protection
  • Severe operating conditions
  • High/Low temperature viscosity
  • Ashless
  • MIL-L-22851D/SAE J1899
  • Teledyne Continental Motors (MHS 24)
  • Textron Lycoming Spec No 301F
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