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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 qual-
ity. The oil change interval (see sec-
tion on "Engine Oil Change Interval")
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 ad-
ditives
is
specifically not recommended
and will increase operating costs.
However, in cases of specific problems
which may arise under certain condi-
tions, additive supplements are avail-
able that can effectively and economi-
cally solve these problems without
causing other difficulties. For example,
if higher detergency is required to
reduce varnish and sludge deposits
resulting from some unusual opera-
tional difficulty, a thoroughly tested
and approved concentrate-"Engine
Oil Supplement"-is available at your
Chevrolet dealer. It
is
suggested that,
in the event of an operational prob-
lem, you consult your dealer for
advice.
"
.
Recommended
Viscosity-The follow-
ing chart will serve as a guide
·
in se-
lecting 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 rec-
ommended 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
40
60
100
TEMP~RATURE
RANGE ANTICIPATED BEFORE NEXT OIL CHANGE,
OF.
51
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