AeroShell straight mineral oils are blended from selected high viscosity index base stocks. These oils do not contain additives except for a small quantity of pour point depressant (which is added when improved fluidity at very low temperature is required) and an anti-oxidant.
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 2100 F in Saybolt Universal Seconds.
The appropriate grades of these AeroShell Oils are approved for use in four-stroke cycle (four-cycle) certified aircraft reciprocating piston engines (except Porsche) and other aircraft radial engines which use oil to specification SAE J1966 (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 cycle 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.