GMC 1995 Suburban Owner's Manual page 300

HEAVY DUTY EMISSIONS
-
GASOLINE ENGINES
RECOMMENDED
~~ ~ ~~ ~
SAE VISCOSITY GRADE ENGINE
OILS
FOR BEST FUEL ECONOMY AND COLD STARTING, SELECT THE LOWEST
SAE VISCOSITY GRADE O I L
FOR THE EXPECTED TEMPERATURE RANGE.
HOT
WEATHER
-
I
l-
SA€ 5W-30
rl
LOOK
FOR THIS
SYMBOL
i
.-
SAE IOW-30
PREFERRED
above 0°F
(-1 8°C)
COLD
WEATHER
DO
NOT
USE SAE 2OW-50 OR ANY OTHER
GRADE OIL NOT RECOMMENDED
As shown in the chart, SAE 1OW-30 is best for your vehicle. However, you
can use SAE 5W-30 if it's going to be colder than 60°F (16°C) before your
next oil change. When it's very cold, you should use SAE SW-30. These
numbers on an oil container show
its
viscosity, or thickness. Do not use
other viscosity oils, such
as
SAE 20W-50.
6-18