A piston engine oil intended for use in certified four-stroke cycle aircraft piston engines. AeroShell Oil W 15W-50 is superior to single grade oils in almost every application. It offers easier starting, better lubrication after start-up, reduced wear, reduced corrosion and rusting, and improved cleanliness, with oil pressures and temperatures equal to that of single grade SAE 50 oils at fully warmed up conditions.
 
U.S. Approved SAE J-1899 Grade Multigrade, British Approved SAE J-1899 Grade Multigrade, NATO Code 0-162 (Obsolete), Joint Service Designation OMD-162