However, generally speaking, for a 2005 F-150, you'd likely find recommendations for a 5W-20 or 5W-30 oil that meets the API certification standards current at the time. Using the wrong oil viscosity or API rating can damage your engine.
To find the correct oil:
1. Locate your owner's manual: This is the most reliable source of information.
2. Check the engine oil fill cap: Sometimes the recommended oil type is printed on the cap itself.
3. Look for a sticker under the hood: Ford often places a sticker with maintenance information, including recommended oil type, near the engine.
Don't rely on general advice; always consult your owner's manual for the precise recommendation for your specific 2005 Ford F-150 4x4 engine.
