GMC 2011 Savana - Manual (Page 278)

Black plate (12,1) GMC Savana Owner Manual - 2011
10-12 Vehicle Care
Selecting the Right Engine Oil
Selecting the right engine oil
depends on both the proper oil
specification and viscosity grade:
Specification
Use and ask for engine oils with
the dexos™ certification mark. Oils
meeting the requirements of the
vehicle should have the dexos™
certification mark on the container.
This certification mark indicates that
the oil has been approved to the
dexos™ specification.
This vehicle was filled at the factory
with dexos™ approved engine oil.
Notice: Use only engine oil that
is approved to the dexos™
specification or an equivalent
engine oil of the appropriate
viscosity grade. Engine oils
approved to the dexos™
specification will show the
dexos™ symbol on the container.
Failure to use the recommended
engine oil or equivalent can result
in engine damage not covered
by the vehicle warranty. If you
are unsure whether the oil is
approved to the dexos™
specification, ask your service
provider. Use of Substitute Engine Oils if
dexos™ is unavailable: In the event
that dexos™ approved engine oil
is not available at an oil change
or for maintaining proper oil level,
you may use substitute engine oil
displaying the API Starburst symbol
and of SAE 5W-30 viscosity grade.
Use of oils that do not meet the
dexos™ specification, however, may
result in reduced performance under
certain circumstances.
Viscosity Grade
SAE 5W-30 is the best viscosity
grade for the vehicle. Do not
use other viscosity oils such as
SAE 10W‐30, 10W‐40, or 20W-50.