Ford 2011 Econoline Owner's Manual page 328

Scheduled Maintenance
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
328
2011 Econoline (eco)
Owners Guide, 3rd Printing
USA (fus)
I n f o r ma t i o n P r o v i d e d b y :
Off-road operation
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