Higher viscosity for dependable lubrication in warmer climates (above 26°C / 78.8°F ambient air temperature).
Utilizes ashless dispersant additive technology to prevent deposit build-up, for cleaner and more efficient engine performance.
| Country | Specification |
|---|---|
|
SAE |
J1899 Grade 60
|
|
Joint Service Designation |
OMD-370
|
|
Lycoming Engines |
Service Instruction No. 1014 N
|
|
Continental Aerospace Technologies |
MHS-24
|
|
Pratt & Whitney |
Service Bulletin 1183
|
AeroShell W Oils are available in three different viscosity grades: AeroShell Oil W80 – AeroShell Oil W100 – AeroShell Oil W120.
The suffix for each grade corresponds to the viscosity of the oil at 210°F in Saybolt Universal Seconds.
AeroShell W Oils are intended for use in four-stroke (four-cycle) certified reciprocating piston engines, including fuel-injected and turbocharged engines. AeroShell W Oils are not recommended for use in automotive engines. For automotive engines converted for use in aircraft, the specific engine manufacturer or the conversion agency should be consulted for proper oil recommendation.
Most radial engine operators use AeroShell Oil W120 in warm weather operations with AeroShell Oil W100 or AeroShell Oil W 15W-50 being used in cooler ambient temperatures.
AeroShell Oil W100 or AeroShell Oil W 15W-50 are the common choices for most operators of Lycoming and Continental flat engines but, during colder parts of the year, use of AeroShell Oil W80 in place of AeroShell Oil W100 would be an excellent choice.
Although some aircraft engine manufacturers and rebuilders/overhaul agencies suggest in their service bulletins the use of a straight mineral oil in new or newly overhauled engines, other rebuilders or manufacturers, especially for engines such as the Lycoming O-320H and O/LO360E, allow either ashless dispersant or straight mineral oil for break-in, whereas ashless dispersant oils are mandated for break-in for all turbocharged Lycoming engines. Operators should check with engine manufacturers or rebuilders for the correct recommendation for the specific engine and application.
Too See AeroShell Oil W120 technical data sheet (TDS) and the AeroShell Oil W120 safety data sheet (SDS). Visit here
AeroShell Oil W120 is a premium ashless dispersant (AD) monograde oil with an SAE 60 viscosity grade. It is specifically designed for high-power aviation piston engines that operate in hot climates or under high-load conditions where a thicker oil film is required to maintain engine pressure and protection.
Yes, AeroShell W120 is the industry standard for large radial engines (such as those from Pratt & Whitney and Curtiss-Wright). Its high viscosity is ideal for the larger clearances found in these engines, providing superior sealing and lubrication in cylinders that operate at higher temperatures.
AeroShell Oil W120 is intended for use in hot ambient conditions, typically where temperatures consistently exceed 26°C (80°F). Because of its high thickness, it should not be used in cold weather as it may not circulate quickly enough during a cold start to protect critical engine components.
The primary difference is the viscosity (thickness). W100 is an SAE 50 oil suitable for standard warm weather, while W120 is a heavier SAE 60 oil designed for even hotter environments or older, high-displacement engines that require more robust oil pressure during operation.
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