Filter
Top Products
• If the oil level is below this
mark, engine oil must be added
to raise the level within the
normal operating range.
• If required, add engine oil to the
engine. Refer to Adding engine
oil in this chapter.
• Do not overfill the engine
with oil. Oil levels above this
mark may cause engine
damage. If the engine is
overfilled, some oil must be
removed from the engine by an
authorized dealer.
7. Put the dipstick back in and ensure it is fully seated.
Adding engine oil
1. Check the engine oil. For instructions, refer to Checking the engine
oil in this chapter.
2. If the engine oil level is not within the normal range, add only certified
engine oil of the recommended viscosity. Remove the engine oil filler cap
and use a funnel to pour the engine oil into the opening.
3. Recheck the engine oil level. Make sure the oil level is not above the
upper hole or the MAX mark on the engine oil level dipstick.
4. Install the dipstick and ensure it is fully seated.
5. Fully install the engine oil filler cap by turning the filler cap clockwise
1/4 of a turn until the cap is fully seated.
To avoid possible oil loss, DO NOT operate the vehicle with the
engine oil level dipstick and/or the engine oil filler cap removed.
Maintenance and Specifications
341
2010 Navigator (nav)
Owners Guide (own2002), 1st Printing
USA (fus)