A little more information please
What model year of Ford Expedition and what is the size of the engine ( 4.6 or 5.4 )
The first model year of the full size Ford Expedition was 1997 , so things have
changed
5W-30 ( according to the 1999 Ford Expedition Owner Guide )
The 2001 Ford Expedition Owner Guide shows ( 5W-20 )
5W-30 ( according to the 2000 Ford Expedition Owner Guide )
( 5 W 20 ) - according to the 2005 Ford Expedition owners manual
5 W 30 ( according to the 1999 Ford Expedition owners manual )
Either 5W20 or 5W30.
The 2000 Ford Expedition owners manual shows ( 5 w 30 )
My 1998 Ford Expedition XLT (4.6L) takes 6 qts of Castrol Motor Oil with a new oil filter.
4.6 and 5.4 are using 5W30
A 1998 Ford Expedition with the V8 4.6L engine requires 6.0 quarts of oil.
5W-30 is the preferred oil , according to the Owner Guide
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