However, generally speaking, for both engines, a 5W-20 or 5W-30 weight oil meeting the specifications listed in your owner's manual (likely something like API SM or SN, or even newer like SN Plus or SP) is a good starting point. Always check your owner's manual for the exact specifications and recommendations from Ford. Using the wrong oil can damage your engine.
Don't rely on generic advice online. Consult your owner's manual to ensure you are using the correct viscosity and API rating for your specific Sport Trac engine.
