What Kind of Engine Oil to Use

WARNING: This page is about a different car, the 2004 Pontiac Aztek and 2004 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.

Two factors should be considered when determining type of oil to use in a vehicle:

The engine requires oil meeting GM Standard GM6094M. Use only oil that meets this standard.

Fig 1: Identifying Recommended Engine Oil Viscosity (United States & Canada)

Courtesy of GENERAL MOTORS CORP.

SAE 5W-30 is the only viscosity grade recommended for use in GM vehicles.
- If the temperature is greater than -18°C (0°F) and if SAE 5W-30 is not available, you may use SAE 10W-30.
  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).
- If the temperature falls below -20°C (-4°F), it is recommended that you use either an SAE 5W-30 synthetic oil or an SAE 0W-30 oil. Both will provide easier cold starting and better protection for your engine at extremely low temperature.