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.
5 WITH A NEW OIL FILTER.
Most Pontiacs will hold about 6 quarts with a filter change.
V8 5 quarts Diesel 11.5 to 12 quarts
my 1993 b250 5.2 v8 holds approx 5.2 quarts, but five 5 quarts is fine.
A 2000 Ford Crown Victoria with the 4.6L V8 engine requires 5.0 quarts of oil.
6 quarts in 5.3 v8 (97% of all made that year)
5.2 and 5.9 both hold five quarts. 4.7 holds six quarts.
In a Ford EXPEDITION : With engine oil filter change : The 4.6 litre V8 engine takes ( 6.0 U.S. quarts )
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
According to the 1997 Ford F-150 owners manual : With engine oil filter change : ( 6.0 U.S. quarts / 5.7 litres of engine oil ) for the 4.6 liter V8 engine
For a V8 I would guess 4 quarts,usually the standard amount.