Buick 1993 Skylark Owner's Manual page 227

RECOMMENDED SAE VlSCOSlTY 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
COLD
FOR LOOK THIS
@
LABEL
5W-30
"t'LcoNse94'
IE 1OW-30
SAE 5W-30
PREFERRED
IF NEITHER SAE 5W-30 NOR SAE low-30
GRADE OILS ARE AVAILABLE, SAE 30
GRADE MAY BE USED AT TEMPERATURES
ABOVE 40 DEGREES F (4 DEGREES C).
WEATHER
DO NOT USE SAE 1OW-40, SAE 2OW-50 OR
ANY OTHER GRADE OIL NOT RECOMMENDED
SAE 5W-30 (L4 2.3L L40 Engine)
As shown in this viscosity chart, SAE 5W-30 is best
for your vehicle. However, you can use
S A E
low-30
if it's going to be 0
O F
(-
18 C) or above.
These numbers on an oil container show its viscosity, or
thickness.
Energy Conserving I1
Oils with these words on the container will help you
save fuel.
This doughnut-shaped logo (symbol) is used on most oil
containers to help you select the correct oil.
You should look for this on the oil container, and use
only those oils that display the logo.
GM Goodwrench@ oil (in Canada, GM Engine Oil)
meets all the requirements for your vehicle.
Engine Oil Additives: Don't add anything to your oil.
Your Buick dealer is ready to advise if you think
something should be added.
When to Change Engine Oil: See if any one of these
is true for you:
Most trips are less than 4 miles (6 km).
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