Engine Oil Additives; When To Change Engine Oil - Chevrolet 2002 Corvette Owner's Manual

D
-
SAE 5W 30
As shown in the viscosity chart, SAE 5W
best for your vehicle. However, you can use SAE
-
10W 30 if it's going to be 0
These numbers on an oil container show its viscosity,
or thickness. Do not use other viscosity oils such as
-
SAE 20W 50.
You should look for this on the oil container, and use
only those oils that are identified as meeting GM
Standard 4718M and have the starburst symbol on the
front of the oil container.
Your vehicle's engine is filled at the factory with a
Mobil 1 R synthetic oil, which meets all requirements
for your vehicle.
-
30 is
_ _
-
F ( 18 C) or above.
Oils meeting these
requirements should
also have the starburst
symbol on the container.
This symbol indicates
that the oil has been
certified by the American
Petroleum Institute (API).
Substitute Engine Oil: When adding oil to maintain
engine oil level, oil meeting GM Standard GM4718M
may not be available. You can add substitute oil
-
designated SAE 5W 30 with the starburst symbol at
all temperatures. If temperatures are above 0
you may substitute SAE 10W
symbol. Substitute oil not meeting GM Standard
GM4718M should not be used for an oil change.

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.

When to Change Engine Oil

(GM Oil Life System
Your vehicle has a computer that lets you know when
to change your engine oil and filter. This is based on
engine revolutions and engine temperature, and not
on mileage. Based on driving conditions, the mileage
at which an oil change will be indicated can vary
considerably. For the oil life system to work properly,
you must reset the system every time the oil is changed.
_ _
-
F ( 18
-
30 with the starburst
t
)
6-15
C),