Ford Navigator 2012 Owner's Manual page 370

Scheduled Maintenance
Inspect frequently,
service as required
Every 5,000 miles
(8,000 km)
Every 30,000 miles
(48,000 km)
Every 50,000 miles
(80,000 km)
Every 60,000 miles
(96,000 km)
*If equipped with dual rear wheels, rotate front wheels when specified,
rear wheels only if unusual wear is noted
Exclusive use of E85 (Flex Fuel Vehicles only)
Every oil change
interval
370
2012 Navigator (nav)
Owners Guide, 1st Printing
USA (fus)
Off-road operation
Inspect steering linkage, ball joints and U-joints;
lubricate if equipped with grease fittings
Replace cabin air filter (if equipped)
Replace engine air filter
Change engine oil and filter
Inspect wheels and related components for
abnormal noise, wear, looseness or drag
Rotate tires*, inspect tire wear and measure
tread depth
Change automatic transmission fluid (except
6R80 and TorqShift transmissions)
Replace front wheel bearing grease/grease seals if
non-sealed bearings are used (2WD vehicles)
Change manual transmission fluid
Change rear axle fluid (E-450 and F-450/550
only)
Change transfer case fluid (4WD vehicles)
If ran exclusively on E85, fill the fuel tank full
with regular unleaded fuel