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Engine Oil
Recommendations
Use only engine oil which meets
GM 6041-M standard. High quality
oils which are intended for service MS
and pass car makers' tests are of this
quality. The oil change interval (see
section on "Engine Oil Change Inter-
val") and the new vehicle warranty
are based on the use of oils that meet
these requirements.
NOTE: Non-detergent and other low qual-
ity oils are specifically not recommended.
The use of proper engine oils and oil
change intervals are your best assurance
of continued reliability and performance
from your Chevrolet engine.
The regular use of supplemental
additives is specifically not recom-
mended and will increase operating
costs. However, in cases of specific
problems which may arise under cer-
tain conditions, additive supplements
are available that can effectively and
economically solve those problems
without causing other difficulties. For
example, if higher detergency is re-
quired to reduce varnish and sludge
deposits resulting from some unusual
operational difficulty, a thoroughly
tested and approved concentrate -
"Engine Oil Supplement" -
is avail-
able at your Chevrolet dealer. It is
suggested that,
in
the event of an
operational problem, you consult your
dealer for advice.
Recommended Viscosity - The fol-
lowing chart will serve as a guide in
selecting the proper oil viscosity. The
proper viscosity helps assure good
cold and hot starting by reducing fric-
tion and thus increasing cranking
speed.
• SAE 5W and 5W -20 oils are not
recommended for sustained high
speed driving.
• SAE 30 oils may be used at tem-
peratures above 60°F.
Checking Oil Level
The engine oil should be maintained
at proper level. The best time to check
it is before operating the engine or
RECOMMENDED SAE VISCOSITY NUMBER
-20
20
60
80
100
TEMPERATURE RANGE ANTICIPATED BEFORE NEXT OIL CHANGE,
OF.
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