AeroShell Oil W100 SAE 50 Piston Engine Oil
AeroShell Oil W100 is a single-grade, mineral ashless dispersant oil developed for four-stroke certified reciprocating aircraft piston engines. It is suitable for fuel-injected and turbocharged engines where an SAE J1899 Grade 50 oil is specified.
Its non-metallic additive system provides dispersancy, oxidation stability, anti-foaming performance, and protection against scuffing and wear. The ashless dispersant formulation supports engine cleanliness by helping keep sludge and suspended contaminants from accumulating in critical engine areas.
AeroShell Oil W100 is intended primarily for moderate climates. Ambient air-temperatures in the range of 16°C to 32°C (60.8°F to 89.6°F) are the temperatures in which W100 performs best.
Key Features
- Single-grade SAE 50 aviation piston-engine oil
- Mineral ashless dispersant formulation
- Meets SAE J1899 Grade 50
- Intended for moderate ambient temperatures
- Promotes engine cleanliness
- Helps keep engines sludge-free
- Helps reduce oil consumption
- Provides anti-foaming performance
- Supports protection against scuffing and wear
- Non-metallic additive system leaves no metallic ash residue
Recommended Applications
AeroShell Oil W100 is intended for:
- Four-stroke certified reciprocating aircraft piston engines
- Fuel-injected aircraft piston engines
- Turbocharged aircraft piston engines
- Lycoming flat aircraft engines
- Continental flat aircraft engines
- Radial aircraft engines when the viscosity grade is appropriate for the operating climate
AeroShell Oil W100 and AeroShell Oil W 15W-50 are common choices for many Lycoming and Continental flat-engine operators.
Specifications, Approvals, and Recommendations
- SAE J1899 Grade 50
- SAE J1899 replaces former MIL-L-22851D
- Russian MS-20
- Joint Service Designation OMD-250
- Textron Lycoming 301F
- Continental MHS 24B
- Pratt & Whitney Service Bulletin 1183
- Curtiss Wright, various service bulletins
- Franklin Engines, various service bulletins
- NATO Code O-125 (obsolete)
Typical Technical Characteristics
The following values are typical of current production and should not be treated as product specifications.
| Property |
Test Method |
Typical Value |
| SAE viscosity grade |
Not specified |
50 |
| Density at 15°C |
ASTM D4052 |
887 kg/m³ |
| API gravity |
ASTM D287 |
27.8 |
| Kinematic viscosity at 40°C |
ASTM D445 |
204 mm²/s |
| Kinematic viscosity at 100°C |
ASTM D445 |
18.1 mm²/s |
| Viscosity index |
ASTM D2270 |
Greater than 96 |
| Pour point |
ASTM D5949 |
Less than -21°C |
| Flash point |
ASTM D92 |
Greater than 250°C |
| Total acid number |
ASTM D664/974 |
Less than 0.5 mgKOH/g |
| Sulfur |
ASTM D4951 |
0.38% mass |
| Copper corrosion, 3 hours at 100°C |
ASTM D130 |
1a |
| Ash content |
ASTM D482 |
Less than 0.004% mass |
| Trace sediment |
ASTM D2273 |
Passes |
| Foaming tendency |
ASTM D892 |
Passes |
| Trace metal content |
ASTM D4951 |
Passes |
Frequently Asked Questions
What is AeroShell Oil W100 used for?
AeroShell Oil W100 is used in four-stroke certified reciprocating aircraft piston engines, including fuel-injected and turbocharged engines, where an SAE J1899 Grade 50 ashless dispersant oil is specified.
Is AeroShell Oil W100 an ashless dispersant oil or a straight mineral oil?
AeroShell Oil W100 is a mineral-based ashless dispersant oil. It contains non-metallic dispersant additives and should not be confused with AeroShell Oil 100, which is a straight mineral oil primarily associated with engine break-in.
What viscosity grade is AeroShell Oil W100?
AeroShell Oil W100 is an SAE 50 oil. The “W100” designation refers to the approximate viscosity of the oil at 210°F when expressed in Saybolt Universal Seconds.
Can AeroShell Oil W100 be used during engine break-in?
Break-in recommendations vary by engine manufacturer and overhaul facility. Some allow either ashless dispersant or straight mineral oil, while others specify straight mineral oil.
What’s the difference between AeroShell Oil W100, AeroShell Oil W80, and AeroShell W120?
The primary differences are viscosity grade and intended ambient conditions:
- AeroShell Oil W80 is SAE 40 and is intended for colder climates from approximately -17°C to 21°C.
- AeroShell Oil W100 is SAE 50 and is intended for moderate climates from approximately 16°C to 32°C.
- AeroShell Oil W120 is SAE 60 and is intended for warmer climates above approximately 26°C.
All three are single-grade mineral ashless dispersant oils intended for normal aircraft piston-engine service.
What’s the difference between AeroShell Oil W100 and AeroShell Oil W100 Plus?
While AeroShell Oil W100 and AeroShell Oil W100 Plus are both SAE 50 ashless oils, AeroShell Oil W100 Plus includes an anti-wear additive, an anti-corrosion additive, and a metal passivator.
What AeroShell Oil W100 package sizes does Petroleum Service Company offer?
Petroleum Service Company offers AeroShell Oil W100 in the following package configurations:
- 6/1-quart case (SKU: 550050832)
- 55-gallon drum (SKU: 550041163)
