Chevrolet Low Cab Forward 6.7L Diesel Engine 6500XD (GMNA-Localizing-
U.S.-15749874) - 2022 - CRC - 12/2/21
Vehicle Care
197
Caution (Continued)
wipe it away. If this precaution is not
taken, the spilled oil could ignite and a
fire could spread.
Do not leave flammable items, such as
rags or gloves, in the engine
compartment. They could cause a fire.
You and others could be seriously injured.
Engine oil lubricates and cools the engine's
internal components. The quality of the oil
is degraded and the quantity of oil is
reduced by evaporation, discharge and
combustion during the operation of the
engine. Continually using the same oil
without checking the level, or without
replenishing and changing it could cause
seizure or damage to the engine.
Prevent dirt from entering the filler port
when adding the oil. If foreign matter mixes
with the oil, it could damage the engine.
Adding oil above the "FULL" mark on the oil
dipstick could result in faulty engine
operation. Be sure to check the oil level by
using the oil dipstick.
Failure to use Cummins-recommended
engine oil could result in engine or DPF
breakdown, or in poor fuel efficiency.
Choosing the Right Quality Oil
If you do not use the oil intended for a
vehicle equipped with a Diesel Particulate
Filter (DPF), both the engine and the DPF
may break down and fuel economy may
decrease. Be sure, therefore, to use the oil
intended for vehicles equipped with DPF.
Oil Identification Logo
A logo (symbol) is used on most oil
containers to help you select the oil you
should use. The top portion of the logo
shows the oil quality by API designations
such as CK-4. The center portion of the logo
shows the SAE viscosity grade, such as SAE
*W-40 (* indicates viscosity on the low
temperature side). To determine the
viscosity required for your vehicle's diesel
engine, see "Engine Oil Viscosity Chart" in
this section.
Change Intervals
The oil and oil filter change intervals for
your engine are based on the use of
recommended oil quality and viscosity, as
well as high-quality filters such as Cummins
genuine oil filters. Using oil other than
recommended, or oil and filter change
intervals longer than recommended, could
reduce engine life. Damage to engines due
to improper maintenance or use of incorrect
oil quality and/or viscosity is not covered by
warranty. (See the Cummins Owner's
Manual for warranty details.)
Your engine was filled with a high-quality
engine oil when it was built. You do not
have to change this oil before the first
recommended change interval. Oil and filter
change intervals depend on how you use
your vehicle. For information on the proper
oil and filter change intervals. See