With oil and filter change it takes 5 qts. with just oil change and not filter 4 qts.
On a 3.8L 95 mustang the oil filter mounts to the oil pump.
My ( 1991 ) 5.0 LX Ford Mustang always used 5W-30 as recommended
5 w 30
Five quarts with filter
Drain old oil out of car change oil filter and refill with fresh oil.
For the 3.8 liter V6 engine in a 1997 Ford Mustang : With engine oil filter change : ( 4.7 liters of engine oil )
My ( 1991 ) Ford Mustang 5.0 LX came from the factory with ( 5W-30 )
( 5 quarts ) with filter change - according to the 2000 Ford Mustang owners manual
The 2001 Ford Mustang owners manual shows ( 5 quarts ) of engine oil with filter change
every 3,000 miles. oil and filter
The 1999 Ford Mustang 3.8 liter V6 engine takes : ( 5 quarts with engine oil filter change )