Straight 80 Grade, SAE 40 Aviation Engine Oils for normal operation are designed to protect internal aviation engine components from wear during flight. These oils keep engine components free of debris and sludge, have excellent antiwear properties, and are compatible with most aviation oils.
Aviation Grade 100 Straight Mineral Oil is most often intended to be used in four stroke piston aircraft engines and some antique engines. They are not recommended for use in automotive engines converted to aircraft.
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