Aviation Oil EE oils are designed to meet the requirements of modern aircraft piston engines used in commercial, military and private aircraft. Ashless-dispersant aviation engine oils have attained wide-spread use due to their ability to keep engines cleaner than non-dispersant oils. The four grades of Aviation Oil EE meet the requirements of major engine manufacturers where monograde ashless-dispersant engine oils are recommended. Aviation Oil EE products are U.S. Military approved under SAE J1899, which replaced MIL-L-22851D and are listed in the U.S. Military Qualified Products List QPL-1899. Specific viscosity grades are approved by Pratt and Whitney, Teledyne Continental Motors, and Textron Lycoming and included in their respective Qualified Products Lists. Appropriate viscosity grades are recommended for Curtis-Wright, Franklin, and Rolls-Royce engines. Compatibility: Aviation Oil EE Series is compatible with nondispersant mineral oils as well as with other ashless-dispersant oils that meet the requirements of MIL-L-22851D/SAE J1899. They can be used in high-time engines that have previously used a straight mineral oil. If this is done, however, it is advisable to carry out the oil-screen inspection recommended by the engine manufacturer.