Use heavy duty 10w40 oil and depends if you had fully synthetic or not. I use Delo fully syn. 10w40 that's whats reccomended
5w3o
5W-20
5w 20
5W-30 is the preferred oil , according to the Owner Guide
5W-30
5 W - 20
International
According to the 2001 Ford Crown Victoria Owner Guide : ( 5W-20 , with engine oil filter change 5.0 U.S. quarts )
A 2002 Ford F250 truck uses 5W-20 oil. It should be full synthetic only. It can hold up to 6 quarts.
According to the 2004 Ford Expedition Owner Guide : Both the 4.6 and the 5.4 take the ( Motorcraft FL-820-S ) engine oil filter
I was looking at the 2001 Ford F-550 Owner Guide and it shows : For both the 5.4L V8 and the 6.8L V10 GASOLINE engines : The ( Motorcraft FL-820-S ) engine oil filter is used
F550 is a large truck that is turbo diesel v6 or v8 models very difficult to maintain i have 2 in my shop they are very tricky when changing oil and fuel filtes on them. duel wheels at the back.