How much oil for a ford explorer 2003 4.0L?

The 2003 Ford Explorer 4.0L engine requires 5.5 quarts of oil. However, it's always best to check your owner's manual for the most precise and up-to-date information. The amount might slightly vary depending on the specific filter used. You should always add oil a little at a time and check the dipstick frequently to avoid overfilling.