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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-
va1") and the new vehicle warranty
are based on the use of oils that meet
these requirements.
NOTE:
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 diH'iculty, a thoroughly
tested and approved concentrate -
"Engine Oil Supplement" is avail-
able at your Chevrolet dealer. It is
suggested that, i n 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-
E
tion and thus increasing cranking
speed.
ommended for sustained high speed
driving.
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
as the last step in a fuel stop. This will
allow the oil accumulation in the en-
gine to drain back in the crankcase.
To check the level, remove the oil
VISCOSITY NUMBER
-3'o - 2b 6 2b 4'o 60 8'o 160
TEMPERATURE RANGE ANTICIPATED BEFORE NEXT OII. CHANGE. °F .
55
4
RECOMMENDED SA
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