Ford F–250 User Manual page 24

General maintenance information
A symbol has been developed by the
American Petroleum Institute (API)
to help you select the proper engine
oil. It will be included on the oil
container you purchase. The top
section of the symbol shows the oil
performance by the API designation.
This should match the owner guide recommendation. The center section
will show the SAE viscosity grade. The lower section will state energy
conserving if the oil has proven fuel saving capabilities.
Changing engine oil and filter
Change your oil and filter according to the "Service Guide". Change more
frequently if your vehicle operation includes extended periods of idling
or low-speed operation, driving for a long time in cold temperatures or
driving short distances. See the following section "Engine Lubrication for
Severe Service Operation" for all severe duty restrictions.
Use Ford Engine Oil Filter Part No. F4TZ-6731–A (FL–1995) or
equivalent. These filters protect your engine by filtering harmful,
abrasive or sludge particles. The FL–1995 filters particles significantly
smaller than most available "will fit" filters.
To replace, use an oil filter wrench to unscrew the filter from the oil
cooler fitting. Turn it horizontally to let excess oil drain off, and remove.
Do not handle a hot oil filter with bare hands.
Clean the filter mounting area on the oil cooler, lightly coat the gasket
surface of the new filter with clean engine oil and hand tighten until the
gasket contacts the base. Then tighten another 1–1/4 to 2 turns. Fill
the crankcase and run the engine to check for leaks.
Continuous contact with USED motor oil has caused cancer in
laboratory mice. Protect your skin by washing with soap and
water.
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SAE
15W-40