A 100% synthetic 15W-50 oil engineered for diesel engines used in competition. Delivers maximum protection and durability in the face of extreme heat and heavy loads. Suitable for highly-modified turbo-diesel engines, including Fleece Engineering Race Engines. Available for sale in USA only.
Also see the Freedom Series Diesel 5W-40, 10W-30 and 15W-40 and Fleece Break-in Oil.
Fleece Freedom Series Synthetic Diesel Racing Oil package sizes include:
1-Quart Bottle (or buy case of 12)
Oil Depot can offer Fleece/AMSOIL Freedom Series Synthetic Diesel Oils at wholesale prices. Request a wholesale price list using the contact form on this page.
Suitable Applications For Fleece Freedom Series Synthetic 15W-50 Diesel Racing Oil
Freedom Series Racing 15W-50 covers the latest API CK-4 specification. Therefore, it is compatible with the very latest turbo-diesel engines, as well as older engines. Ideal for high-horsepower competition engines where a 50-weight diesel engine oil is suggested.
Ideal for engines used in dyno events, sled pulls and drag racing.
Maximum Wear Protection
This 100% synthetic formula is loaded with anti-wear ingredients that protect your investment. Generous doses of ZDDP and phosphorus protect pistons and cylinder walls under extreme loads. This Fleece/AMSOIL Racing 15W-50 maintains stable viscosity protection under heavy loads and extreme heat.
Protects From The Effects Of Fuel Dilution
High-horsepower diesels are capable of pumping large volumes of fuel in a short interval. This can contribute to fuel dilution in the engine oil. The powerful Fleece/AMSOIL formula prevents metal-to-metal wear, even when the oil has some fuel dilution.
Preserves Turbo-Chargers
Competition diesel engines can be tuned on the edge. This can mean ultra-hot turbocharger temperatures. Fleece/AMSOIL Racing 15W-50’s robust synthetic formula resists oxidation and deposit formation. The result is rock-steady protection and clean, deposit-free performance.
Service Life Of Fleece Freedom Series Racing Synthetic 15W-50 Diesel Engine Oil
When used for competition applications, the service life of this oil is at the discretion of the vehicle owner or engine builder.
Can You Mix Fleece Racing Synthetic 15W-50 With Other Motor Oils?
Fleece Freedom Series Racing Synthetic 15W-50 Diesel Engine Oil is compatible with all other brands of conventional, semi-synthetic and synthetic diesel engine oils. While you can safely mix Fleece Freedom Series Diesel Oils with other brands, this will reduce the drain interval and performance capabilities of this engine oil.
The use of any aftermarket diesel engine oil additives is definitely NOT recommended.
Specifications of Fleece Freedom Series 15W-50 Synthetic Diesel Racing Oil (FD1550) | |
| Kinematic Viscosity @ 100°C, cSt (ASTM D-445) | 21.0 |
| Kinematic Viscosity @ 40°C, cSt (ASTM D-445) | 157 |
| Viscosity Index (ASTM D-2270) | 156 |
| CCS Viscosity @ -20°C, cP (ASTM D-5293) | 5856 |
| Pour Point °C (°F) (ASTM D-97) | -39 (-38) |
| Noack Volatility (DIN 51581) 250°C for 1 hour, % weight loss | 4.7 |
| Total Base Number | 10.5 |
| High Temperature/High Shear Viscosity, cP (ASTM D5481) | 5.6 |
| Sulfated Ash Content, wt. % | 1.0 |
