According to the 2003 Ford F-150 owners manual : ( 5W-20 engine oil ) for the 5.4 liter V8 engine
The best kind of oil to use for a Ford E-150 would be Champion Blue Flame. For older engines a good oil to use is the Delo 15w40.
According to the 2003 Ford F-150 owners manual : For the 4.6 liter V8 engine : With engine oil filter change : ( 6.0 U.S. quarts )
( 6 quarts ) WITH ENGINE OIL FILTER CHANGE , according to the SVT supplement for the 2003 Ford F-150 lightning
Inside the block in the bottom.
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 )
In a 2003 Ford F-150 : With engine oil filter change : The 5.4 liter V8 engine takes ( 6.0 U.S. quarts ) according to the Owner Guide
According to the 2003 Ford F-150 owners manual : For all factory available engines , 4.2 liter V6 , 4.6 and 5.4 liter V8 : With engine oil filter change : ( 6.0 quarts of 5W-20 engine oil )
From 1997 to 2003 Ford F-150 models ( 6 quarts ) with engine oil filter change 2004 and newer ( 7 quarts ) with filter
The 1997 Ford F-150 owners manual shows ( 5 W 30 ) engine oil ( certified for gasoline engines )
Ford uses the Motorcraft blended oil (part synthetic).
According to the 2003 Ford F-150 Owner Guide : With engine oil filter change : ( 6 quarts ) for the 4.6 liter V8 engine