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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
O F
(16
O
C) before your next oil
change. When it's very cold, you should use SAE
5W-30. These numbers on an oil container show its
viscosity, or thickness. Do not use other viscosity oils,
such as SAE 20W-50.
NOTICE:
Use only engine oil with the American Petroleum
Institute Certified For Gasoline Engines
"Starburst" symbol. Failure to use the proper oil
can result in engine damage not covered by your
warranty.
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 5 to 10 miles (8 to 16
k m ) .
This is particularly important when outside
temperatures are below freezing.
driving in stop and go traffic).
0
Most trips include extensive idling (such as frequent
Most trips are through dusty areas.
You frequently tow a trailer or use a carrier on top of
If any one of these is true for your vehicle, then you
need to change your oil and filter every 3,000 miles
( 5 000
k m )
or 3 months
--
whichever comes first.
your vehicle.
If none of them is true, change the oil and filter every
7,500 miles (12 500
k m )
or 12 months -- whichever
comes first.
Engine Coolant Heater (Option)
An engine coolant heater can be a big help if you have
to park outside in very cold weather, 0°F
(-
18 "C) or
colder. If your vehicle has this option, see "Engine
Coolant Heater" in the Index.
6-15
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