Chevrolet 2014 Silverado Owner's Manual page 382

Add enough oil to put the level
somewhere in the proper operating
range. Push the dipstick all the way
back in when through.
Selecting the right engine oil
depends on both the proper oil
specification and viscosity grade.
See
Use and ask for licensed engine oils
®
with the dexos1 approved
certification mark. Engine oils
meeting the requirements for the
vehicle should have the dexos1
approved certification mark. This
certification mark indicates that the
oil has been approved to the dexos1
specification.
Failure to use the recommended
. engine oil can result in engine
damage not covered by the
vehicle warranty. Check with your
dealer or service provider on
whether the oil is approved to the
dexos1 specification.
SAE 0W-20 is the best viscosity
grade for the 5.3L and 6.2L
V8 engines. SAE 5W-30 is the best
viscosity grade for the 4.3L V6, and
6.0L V8 engines. Do not use other
viscosity grade oils such as
SAE 10W-30, 10W-40, or 20W-50.
Cold Temperature Operation: In an
area of extreme cold, where the
temperature falls below 29°C
( 20°F), an SAE 0W-30 oil may be
used in the 4.3L or 6.0L engine. An
oil of this viscosity grade will provide
easier cold starting for the engine at
extremely low temperatures. When
selecting an oil of the appropriate
viscosity grade, always select an oil
of the correct specification. See
Specification earlier in this section
for more information.
Do not add anything to the oil. The
recommended oils with the dexos
specification and displaying the
dexos certification mark are all that
is needed for good performance and
engine protection.
Engine oil system flushes are not
recommended and could cause
engine damage not covered by the
vehicle warranty.