According to the 2003 Ford F-150 Owner Guide :
With engine oil filter change :
( the 5.4 litre V8 engine takes 6.0 U.S. quarts of 5W-20 engine oil )
6 quarts
The 3.8 liter V6 engine in a 2003 Ford Mustang takes ( 5 quarts ) WITH ENGINE OIL FILTER CHANGE
( 6 quarts ) with engine oil filter change , according to the Owner Guide
5 Qts. of motor oil ( 6 quarts with filter )
According to the 2003 Ford Thunderbird Owner Guide : With engine oil filter change : The 3.9 liter V8 engine takes ( 6.5 U.S. quarts of 5W-20 )
The owners manual shows ( 5.5 quarts ) with engine oil filter change
From 1997 to 2003 Ford F-150 models ( 6 quarts ) with engine oil filter change 2004 and newer ( 7 quarts ) with filter
The engine take 6.0 qts. of oil with filter. on the 4.6L
7 quarts
4.5 quarts
According to the 2003 Ford F-250 Owner Guide : With engine oil filter change : The 6.8 liter V10 gas engine takes ( 6 quarts )
According to the 2003 Ford Escort Owner Guide : With engine oil filter change : The 2.0 liter DOHC , Zetec engine takes : ( 4.5 U.S. quarts of 5W-20 )