Oil Requirements
WARNING: This page is about a different car, the 2008 Ford Pickup, 2008 Ford F550 Super Duty, 2008 Ford F450 Super Duty, and 2008 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
The 6.4L diesel engine may be operated over a wide range of operating conditions. It is important to match the viscosity of the engine oil to the vehicle operating conditions. Use the following statements and chart to make sure the oil viscosity chosen is compatible with the expected vehicle operating conditions.
- The heavier oils 15W-40 and 5W-40 are recommended for temperatures over 10°C (50°F) and must be used for heavy duty driving and trailer towing.
- An engine block heater must be used at temperatures below -23°C (-10°F).
- Use the same engine oil and filter change intervals when using synthetic engine oil.
- Use Motorcraft oil or equivalent oil conforming to Ford specification WSS-M2C171-E or API service categories CJ-4 or CJ-4/SM.