AeroShell Oil 80 SAE 40 Break-In Engine Oil
AeroShell Oil 80 is a single-grade SAE 40 straight mineral oil intended primarily for the break-in of new or recently overhauled four-stroke aircraft piston engines. It is blended from selected high-viscosity-index mineral base stocks and does not contain a dispersant additive.
The formulation contains only a small quantity of pour-point depressant, where required, and an antioxidant. Its lower viscosity supports lubrication and oil flow during break-in in colder climates from approximately -17°C to 21°C (1.4°F to 69.8°F).
AeroShell Oil 80 is used in certified aircraft reciprocating piston engines and aircraft radial engines where SAE J1966 Grade 40 oil is specified and an ashless dispersant oil is not required.
Key Features
- Single-grade SAE 40 aircraft piston-engine oil
- Straight mineral, non-dispersant formulation
- Intended primarily for engine break-in
- Suitable for new and recently overhauled engines
- Developed for colder ambient temperatures from approximately -17°C to 21°C
- Blended from selected high-viscosity-index mineral base stocks
- Contains an antioxidant
- Meets SAE J1966 Grade 40
- Suitable for applicable reciprocating and radial aircraft engines
Recommended Applications
AeroShell Oil 80 is intended for:
- Break-in of new four-stroke certified aircraft piston engines
- Break-in of recently overhauled four-stroke aircraft piston engines
- Certified reciprocating aircraft piston engines (excluding Porsche engines)
- Aircraft radial engines
- Engines requiring SAE J1966 Grade 40
- Applications where an oil containing a dispersant additive is not required
The required break-in duration varies by engine and overhaul procedure.
Specifications, Approvals, and Recommendations
- SAE J1966 Grade 40
- SAE J1966 (replaces former MIL-L-6082E)
- Russian MS-14
- Joint Service Designation OM-170
- NATO Code O-115 (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 |
40 |
| Density at 15°C |
ASTM D4052 |
884 kg/m³ |
| API gravity |
ASTM D287 |
28.3 |
| Kinematic viscosity at 100°C |
ASTM D445 |
14.0 mm²/s |
| Viscosity index |
ASTM D2270 |
Greater than 95 |
| Pour point |
ASTM D5949 |
Less than -21°C |
| Flash point |
ASTM D92 |
Greater than 250°C |
| Total acid number |
ASTM D664/974 |
Less than 0.1 mgKOH/g |
| Sulfur |
ASTM D4951 |
0.35% mass |
| Copper corrosion after 3 hours at 100°C |
ASTM D130 |
Passes |
| Ash content |
ASTM D482 |
Less than 0.005% mass |
| Trace sediment |
ASTM D2273 |
Passes |
| Foaming tendency |
ASTM D892 |
Passes |
Frequently Asked Questions
What is AeroShell Oil 80 used for?
AeroShell Oil 80 is used primarily during the break-in of new or recently overhauled four-stroke certified aircraft piston engines. It may also be used in applicable aircraft radial engines where an SAE J1966 Grade 40 non-dispersant oil is specified.
Is AeroShell Oil 80 a straight mineral or ashless dispersant oil?
AeroShell Oil 80 is a straight mineral oil and does not contain an ashless dispersant additive. It is intended primarily for break-in applications where a non-dispersant SAE J1966 oil is required.
Why is straight mineral oil used during engine break-in?
Straight mineral oil may be specified during break-in to support the controlled wear-in process between piston rings and cylinder walls. Proper ring seating helps establish normal compression and oil control while reducing the potential for cylinder-wall glazing.
How long should AeroShell Oil 80 be used during break-in?
The required break-in period varies by engine manufacturer, engine model, and overhaul facility. Follow the break-in duration and oil-change instructions supplied for the specific engine.
What is the difference between AeroShell Oil 80, Oil 100, and Oil 120?
The primary differences are viscosity grade and intended ambient temperature:
- AeroShell Oil 80 is SAE 40 and is intended for colder climates from approximately -17°C to 21°C.
- AeroShell Oil 100 is SAE 50 and is intended for moderate climates from approximately 16°C to 32°C.
- AeroShell Oil 120 is SAE 60 and is intended for warmer climates above approximately 26°C.
All three are straight mineral oils intended primarily for aircraft piston-engine break-in.
What is the difference between AeroShell Oil 80 and AeroShell Oil W80?
Both products are single-grade SAE 40 oils intended for colder climates, but they serve different purposes. AeroShell Oil 80 is a straight mineral, non-dispersant oil intended primarily for engine break-in. AeroShell Oil W80 is an ashless dispersant oil intended for normal engine service where SAE J1899 Grade 40 is specified.
Can AeroShell Oil 80 be used in every aircraft piston engine?
No. AeroShell Oil 80 is intended only for engines that permit SAE J1966 Grade 40 straight mineral oil and do not require an ashless dispersant lubricant. Porsche aircraft engines are excluded from the listed applications.
What AeroShell Oil 80 package sizes does Petroleum Service Company offer?
Petroleum Service Company offers AeroShell Oil 80 in the following package configurations:
- 6/1-quart case (SKU: 550050831)
- 55-gallon drum (SKU: 550041181)
