AeroShell Oil W 15W-50 was developed in co-operation with Textron Lycoming and Continental Motors and conforms to their specifications 301F and MHS-24A respectively. This oil is also approved under Military Specification MIL-L-22851 which is now obsolete and has been replaced by the SAE J-1899 specification. AeroShell Oil W 15W-50 is also approved for use in all Pratt & Whitney radial aircraft engines. In addition AeroShell Oil W 15W-50 meets the provisions of Lycoming Service Bulletin 446C and 471, plus Service Instruction 1409A and meets the American FAA Airworthiness Directive 80-04-03 which specifies special anti-wear requirements for certain engine models.
AeroShell Oil W 15W-50 already contains, in the correct proportions, an anti-wear additive equivalent to the Lycoming additive LW 16702; operators who use AeroShell Oil W 15W50 DO NOT need to add this Lycoming additive to the oil.
AeroShell Oil W 15W-50 is qualified for use in all Continental Motors' liquid cooled and air cooled aircraft piston engines.
Continental Specification: MHS 24A Continental Specification: SIL 99-2 FAA Specification: Airworthiness Directive 80-04-03 R2 Pratt & Whitney Specification: Service Bulletin 1183-S SAE Specification: approved SAE J-1899 Grade Multigrade Textron Lycoming Specification: 301F Textron Lycoming Specification: Service Bulletins 446E and 471B Textron Lycoming Specification: Service Instruction 1409C