The 2003 Ford F-150'S4.2 liter 6-cylinder engine and the 4.6 l V6 are both equipped with 6 US quarts of 5W-20 with a filter. The F-150'S5.4 liter V8 engines maintain the same capacity and lubricant type. Oil and filter changes should be scheduled every 7,500-10,000 miles or 12 months if using fully synthetic lubricants, or every 3,000-5,000 miles or 6 months, if filling with conventional oil. The advantages of using synthetic vs conventional products include better lubrication among moving parts, a longer interval between service appointments and enhanced effectiveness under adverse weather conditions. A motor oil with a thinner viscosity moves more easily in colder temperatures, coating engine components efficiently and providing better protection against friction and corrosion.
Joe Miles
June 16, 2020
I would recommend using 5w30 instead of 5w20 although both will work
John A.
January 2, 2020
All of the engine options the 4.2L V6, both versions of the 4.6L V8 (engine codes [6] 6 and [W] W), and all four versions of the 5.4L V8 (engine codes [3] 3, [L] L, [M] M, and [Z] Z) for the 2003 Ford F-150 need 6 quarts of 5W20 synthetic oil.
The Questions and Answers on this page are the statements and opinions of their respective authors and not VehicleHistory.com. VehicleHistory.com
does not research or authenticate any of the Answers provided.