AeroShell Oils are available in four different viscosity grades:
AeroShell Oil 65 – AeroShell Oil 80 – AeroShell Oil 100 – AeroShell Oil 120
The suffix for each grade corresponds to the viscosity of the oil at 210°F in Saybolt Universal Seconds.
The appropriate grades of these AeroShell Oils are approved for use in four-stroke (four- cycle) certified aircraft reciprocating piston engines (except Porsche) and other aircraft radial engines which use oil to specification SAE J-1966 (MIL-L-6082) and which do not require use of an oil containing a dispersant additive. AeroShell Oils are used primarily during break-in of most new or recently overhauled four-stroke aviation piston engines. The duration and lubrication recommendations for break-in vary, so operators should refer to the original engine manufacturer and/or overhaul facility for specific recommendations.