Engine Oil Additives - Chevrolet 2002 Astro Owner's Manual

As in the chart shown previously, SAE 5W
your vehicle. However, you can use SAE 10W
_ _
-
going to be 0 F ( 18 C) or above. These numbers on
an oil container show its viscosity, or thickness. Do not
use other viscosity oils, such as SAE 20W
NOTICE:
Use only engine oil with the American
Petroleum Institute Certified For Gasoline
Engines starburst symbol. Failure to use the
recommended oil can result in engine damage
not covered by your warranty.
GM Goodwrench R oil meets all the requirements for
your vehicle.
If you are in an area where the temperature falls below
_ _
- -
20 F ( 29 C), consider using either an SAE 5W
synthetic oil or an SAE 0W
easier cold starting and better protection for your engine
at extremely low temperatures.

Engine Oil Additives

Don't add anything to your oil. The recommended oils
with the starburst symbol are all you will need for good
performance and engine protection.
-
30 is best for
-
30 if it's
-
50.
-
30
-
30 oil. Both will provide
When to Change Engine Oil
If any one of these is true for you, use the short trip/city
maintenance schedule:
D
Most trips are less than 5 miles (8 km). This is
particularly important when outside temperatures are
below freezing.
D
Most trips include extensive idling (such as frequent
- -
driving in stop and go traffic).
D
You frequently tow a trailer or use a carrier on top
of your vehicle.
D
The vehicle is used for delivery service, police, taxi
or other commercial application.
Driving under these conditions causes engine oil to
break down sooner. 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 km) or 3 months
occurs first.
If none of them is true, use the long trip/highway
maintenance schedule. Change the oil and filter every
7,500 miles (12 500 km) or 12 months
occurs first. Driving a vehicle with a fully warmed
engine under highway conditions will cause engine oil
to break down slower.
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whichever
--
whichever
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