I would buy 6 quarts of motor oil. But only put in 5 quarts of motor oil. And check. Only add more if needed.
Engine Oil with Filter; 4.6L = 6.0 qts. 5.4L = 7.0 qts. ------------------------------------------------------ actually , according to the owners manual the 2001 Expedition 5.4 L also takes 6 quarts with filter change ( In 2005 the Expedition started using 7 quarts when Ford started using the 5.4 L 3V ( 3 valve per cylinder ) engine in the Expedition )
The 2001 Ford Expedition has 16 valves.
apox 3.7L
4.5 qts
4.2 qts
On a 2001 Ford Expedition : ( 5 ) per wheel ( total of 20 )
My 1998 Ford Expedition XLT (4.6L) takes 6 qts of Castrol Motor Oil with a new oil filter.
4.6 Qts
The 2001 Ford Expedition's engine produces 215 hp @ 4400 rpm.
5 qts. to 6 qts. Max.
6 Qts of oil
6 QTS. with new filter.