Aeroshell Piston Engine Oil
W 15W-50
AeroShell Oil W 15W-50 is a unique blend of high quality mineral oil and over 50% synthetic hydrocarbon base stocks, plus the AeroShell Oil W ashless dispersant additive system. This semi-synthetic blend offers high performance in a wide variety of applications and conditions. The synthetic base stock performance provides for better cold temperature pumping and protection than single grade oils. In addition, the blend of synthetic and high quality mineral base stocks provide high temperature performance superior to that of other fully approved aircraft piston engine oils. The mineral base stocks help disperse lead by-products of combustion, thereby keeping engines free of "grey paint" or lead sludge that can be a problem with some fully synthetic oils.
The anti-wear additive system in AeroShell Oil W 15W-50 provides outstanding wear protection for critical camshafts, lifters and other high wear components.
The anti-corrosion additive package in AeroShell Oil W 15W-50 helps protect low usage engines and engines in high humidity climates against rust and corrosion of critical engine parts such as camshafts and lifters. AeroShell Oil W 15W-50 provides superior anti-corrosion protection for all types of certified aircraft piston engines. When used with proper maintenance procedures, the product provides maximum protection and improves the likelihood that aircraft engines will reach TBO. In addition, this product provides outstanding high temperature oxidation protection for hot running engines. It is designed to keep engines cleaner with less sludge and varnish build-up in critical ring belt and other areas.
Applications
AeroShell Oil W 15W-50 is intended for use in certified four-stroke cycle aircraft piston engines. AeroShell Oil W 15W-50 is superior to single grade oils in almost every application. It offers easier starting, better lubrication after start-up, reduced wear, reduced corrosion and rusting, and improved cleanliness, with oil pressures and temperatures equal to that of single grade SAE 50 oils at fully warmed up conditions.
The anti-corrosion additive system is designed to prevent rust or corrosion in all types of aircraft piston engines. In comparative testing of camshaft rusting under high humidity conditions, AeroShell Oil W 15W-50 was almost entirely rust free while other camshafts conditioned on other oils showed sometimes heavy rusting on cam lobes and bearing surfaces.
These results indicate that AeroShell Oil W 15W-50 can provide maximum anti-corrosion protection for aircraft piston engines, when combined with proper maintenance practices and proper operating conditions.
Because of the improved flow characteristics of AeroShell Oil W 15W-50, operators may observe slightly lower oil temperatures in some aircraft. On larger aircraft, the oil cooler flap will normally compensate for this change. However, in small aircraft, oil temperature could be reduced slightly. Operators should always check the oil temperature to ensure that they are in the range specified by the manufacturer. Most manufacturers recommend cruising oil temperatures between 82 to 93°C (180 to 200°F). Oil temperatures significantly below this range can result in excessive water and fuel contamination in the crankcase.
Aeroshell Oil W 15W-50 Key Features
• Provides unsurpassed rust and corrosion protection for aircraft engines
• Promotes engine cleanliness, fights wear, offers excellent anti-foam properties
• Helps reduce oil consumption by up to 50% and provides superior oiL flow at low temperatures
• Compatible with other approved aircraft piston engine oils
• Functions as an all season oil, no seasonal changes needed
• Reduces fuel consumption by up to 5% over straight grades
• Provides unequalled high temperature oxidation stability
Refer to General Notes at the front of this section for information on oil change recommendations and engine break-in. AeroShell Oil W 15W-50 is 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.
Specifications
AeroShell Oil W 15W-50 was developed in co-operation with Textron Lycoming and Teledyne Continental Motors and conforms to their specifications 301F and MHS-24A respectively. This oil is also approved under Military Specification MIL-L-22851 which is now obsolete and has been replaced by the SAE J-1899 specification. AeroShell Oil W 15W-50 is also approved for use in all Pratt & Whitney radial aircraft engines. In addition AeroShell Oil W 15W-50 meets the provisions of Lycoming Service Bulletin 446C and 471, plus Service Instruction 1409A and meets the American FAA Airworthiness Directive 80-04-03 which specifies special anti-wear requirements for certain engine models.
AeroShell Oil W 15W-50 already contains, in the correct proportions, an anti-wear additive equivalent to the Lycoming additive LW 16702; operators who use AeroShell Oil W 15W-50 DO NOT need to add this Lycoming additive to the oil. AeroShell Oil W 15W-50 is qualified for use in all Teledyne Continental Motors’ liquid cooled and air cooled aircraft piston engines.
| AEROSHELL OIL |
15W-50 |
| U.S. |
Approved J-1966 Grade Multigrade |
| British |
Approved J-1966 Grade Multigrade |
| French |
- |
| Russian |
- |
| NATO Code |
O-162 Obsolete |
| Joint Service Designation |
OMD-162 |
Equipment Manufacturer Approvals
AeroShell Oil W 15W-50 is approved for use by the following engine manufacturers:
| Textron Lycoming |
301F
Service Bulletin 446C and 471 |
| Teledyne Continental |
MHS 24A
SIL 99-2 |
| Pratt & Whitney |
Service Bulletin 1183-S |
| FAA Airworthiness Directive |
80-04-03R2 |
Typical Properties
| Properties |
SAE J-1899 |
Multigrade Typical |
| Oil Type |
- |
Mixed synthetic hydrocarbon and mineral |
| SAE Viscosity Grade |
Multigrade |
Multigrade |
| Colour ASTM |
- |
4.0 |
| Density @ 15°C kg/l |
Report |
0.86 |
Kinematic viscosity mm2/s @ 100°C
Kinematic viscosity mm2/s @ 40°C |
-
- |
19.6
122 |
| Viscosity Index |
100 min |
160 |
| Pourpoint °C |
Report |
-36 |
| Flashpoint Cleveland Open Cup °C |
220 min |
238 |
| Total Acidity mgKOH/g |
1.0 max |
0.01 |
| Carbon residue % m |
- |
0.14 |
| Sulphur % m |
0.6 max |
0.1 |
Copper corrosion @ 100°C
Copper corrosion 3 hrs @ 205°C |
1 max
3 max |
1
2 |
| Ash content % m |
0.011 max |
0.006 |
| Trace sediment |
Must pass |
Passes |
| Foaming tendency |
Must pass |
Passes |
Elastomer compatibility AMS 3217/1 72 hrs @ 70°C swell %
Elastomer compatibility AMS 3217/4 72 hrs @ 150°C swell % |
Must pass
Must pass |
Passes
Passes |
| Trace metal content |
Must pass |
Passes |
| Compatibility |
Must pass |
Passes |
This product is made in more than one location and the approval status and typical properties may vary between locations.
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