Ford 2008 F-150 Owner's Manual page 346

Maintenance and Specifications
4.6L/5.4L V8 engine
5. Locate and carefully remove the engine oil level dipstick.
6. Wipe the dipstick clean. Insert the dipstick fully, then remove it again.
If the oil level is between the lower and upper holes or between
the MIN and MAX marks (depending on application), the oil
level is acceptable. DO NOT ADD OIL.
4.2L V6 engine
346
2008 F-150
Owners Guide (post-2002-fmt)
USA