Which motor oil are you going to use for your 5.4?

Looks like Mobil1 does not exist in the 5w-20.

 

I think Mobil 1 just came out with a 0W20 that meats the Ford spec.

 

Mobil "Synthetic" all the way! I can't prove it, but I know synthetic makes the engine run smoother and it boosts your gas milage a bit.

 

XCR is correct-Mobil 1 does make a 0W20 oil that exceeds Ford's 5W20 spec (the 5W20 is also marked on the Mobil 1's 0W20 bottle).. Even though Mobil 1 meets/exceeds Ford's spec, on their website, all they talk about is how the 0W20 oil is great for Honda's high revving 4-6cyl engines, not much said about Ford.
Almost makes you wonder if Mobil 1 thinks Ford's specs are crazy.

 

Whatever Oil the dealer puts in my truck when I take it for an oil change.