Pontiac 2005 GTO User Manual download pdf (Page 201)

100

101

What Kind of Engine Oil to Use

Look for two things:

• GM4718M

Your vehicle’s engine requires a special oil meeting

GM Standard GM4718M. Oils meeting this

standard may be identiﬁed as synthetic. However,

not all synthetic oils will meet this GM standard.

You should look for and use only an oil that meets

GM Standard GM4718M.

Notice: If you use oils that do not have the

GM4718M Standard designation, you can cause

engine damage not covered by your warranty.

• SAE 5W-30

As shown in the viscosity chart, SAE 5W-30 is best

for your vehicle.

These numbers on an oil container show its

viscosity, or thickness. Do not use other viscosity

oils such as SAE 20W-50.

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).

You should look for this on the oil container, and

use only those oils that are identiﬁed as meeting

GM Standard GM4718M and have the starburst symbol

on the front of the oil container.

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