5 to 5 1/2 with a filter change. i suggest installing 4 qts and then checking the level using the dip stick. at that point it should indicate that you are about 1 qt low (the oil should cover the dipstick up to the lower part of the crosshatching). top it off with the 5th qt and then start the motor for 30 seconds or so to check for leaks. recheck the dipstick level and top off if necessary.
4.5 quarts
( 5 quarts ) with engine oil filter change ( for the 4.0 liter V6 and the 5.0 liter V8 )
five
6 quarts
If you are changing the oil and the filter then you will need 5 quarts.
The engine holds six quarts of 10w30.
5 quarts
If it's a 3.5 liter engine it will take 6 quarts with oil filter.
V8 5 quarts Diesel 12 quarts
5 quarts 10w30 or 5w30
7 quarts
The 1999 Ford Mustang 3.8 liter V6 engine takes : ( 5 quarts with engine oil filter change )