Check owner's manual. If you don't have one copy and paste link below; www.fleet.Ford.com/maintenance/owners_manuals
6 quarts ( 5.7 liters ) with filter change for the 5.4 L on a 2002 F150
about 5 qts
We need to know which engine you have to answer this question.
Only on the 4.2 liter V6 engine , the 4.6 liter and 5.4 liter are Coil On Plug ( C.O.P. ) ignition
owners manual in glove box should say
The maximum towing capacity for this 1991 Ford F-150 is 8,100 pounds. This is for the 5.0 Liter V8 engine.
In a 2002 Ford F-150 : There were ( 3 ) engine sizes offered from the factory : The 4.2 liter V6 engine and the 4.6 or 5.4 liter V8 engines
According to the Owner Guide ( 6 quarts / 5.7 liters ) with engine oil filter change
According to the 2002 Ford F-150 Owner Guide : For the 5.4 liter V8 engine : ( Motorcraft FL-820-S engine oil filter )
a/c compresser
7 quarts ( 6.6 liters ) with engine oil filter change for the 5.4 liter in a 2006 Ford F-150 according to the Owner Guide
In a 2001 Ford F-150 , 5.4 liter V8 engine : With engine oil filter change : ( 5.7 litres / 6.0 U.S. quarts )