Dodge 2009 Ram Diesel Owner's Manual Supplement page 89

Checking the oil while the vehicle is on level ground will
improve the accuracy of the oil level readings. Add oil
only when the level on the dipstick is below the "ADD"
mark. The total capacity from the low mark to the high
mark is 2 qts (1.9L).
CAUTION!
Overfilling or underfilling the crankcase will cause
oil aeration or loss of oil pressure. This could damage
your engine.
Never operate the engine with oil level below the "ADD"
mark or above the upper "SAFE" mark.
Change Engine Oil
Refer to "Oil Change Required" under "Overhead Con-
sole with Electronic Vehicle Information Center/System
Status (EVIC Displays)" in Section 3 of this manual for
recommended engine oil change intervals.
MAINTAINING YOUR VEHICLE 87
Engine Oil Selection
For best performance and maximum protection under all
types of operating conditions, the manufacturer only
recommends engine oils that are API CJ-4 certified and
meet the requirements of Chrysler LLC. Use MOPAR or
an equivalent oil meeting Chrysler Material Standard
MS-10902. Products meeting Cummins CES 20081 may
also be used. The identification of these engine oils are
typically located on the back of the oil container.
American Petroleum Institute (API) Engine Oil
Identification Symbol
This symbol means that the oil has
been certified by the American Petro-
leum Institute (API). The manufac-
turer only recommends API Certified
engine oils.
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