Dodge RAM 1500 Owner's Manual page 279

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 the "Maintenance Schedule" for the proper
maintenance intervals.
Engine Oil Selection
For best performance and maximum protection under all
types of operating conditions, the manufacturer only
MAINTAINING YOUR VEHICLE 277
recommends engine oils that are API CJ-4 certified and
meet the requirements of Chrysler Group 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.
Oils with a high ash content may produce damaging
deposits on cylinder head valves and/or aftertreatment
6