Shell Aeroshell W80 Aviation Oil is specifically developed for aviation piston engines. This product combines an additive package along with selected high viscosity index base oils to give extra stability and anti-foaming performance.  It is approved for use in four stroke cycle certified aircraft reciprocating piston engines.  Aeroshell oils are used primarily during break in of most new or recently overhauled four stroke cycle aviation piston engines.

Specification and approvals:
J-1966 (replaces MIL-L-6082E) Grade 40
AIR 3560/ D Grade SAE 40
MS-14