TrailBlazer 4WD L6-4.2L VIN S (2002)
Engine Oil: Description and Operation
Oil Viscosity
ENGINE OIL VISCOSITY, UNITED STATES AND CANADA
NOTICE: Using oils of any viscosity other than those recommended could result in engine damage. When choosing an oil, consider the range of
temperatures the vehicle will be operated in before the next oil change. Then, select the recommended oil viscosity.
SAE 5W-30 is the only viscosity grade recommended for your vehicle. Use only oils which have the API Starburst symbol and which are also
identified as SAE 5W-30. If the temperature range is-18°F( 0°C) or above SAE 10W-30 oil which has the API Starbust symbol is acceptable if SAE
5W 30 oils is not available. Areas where the temperature falls below -29°F (-20°C), either an SAE 5W-30 synthetic oil or and SAE 0W-30 oil is
recommended. Both will provide easier cold starting and better protection for the engine at extremely low temperatures. Do not use other viscosity
grade oils, such as SAE 10W-40 or SAE 20W-50 under any conditions. SAE 5W-30 is the recommended engine oil viscosity. Engine oil viscosity
thickness has an effect on the fuel economy and the cold-weather operation engine starting and oil flow. Lower viscosity engine oils can provide better
fuel economy and cold-weather performance. However, higher temperature weather conditions require higher viscosity engine oils for satisfactory
lubrication. When the temperature is consistently above -18°C (0°F), 10W-30 may be used. SAE 20W-50 or oils of other viscosity rating or quality
designations are NOT recommended for use in any GMC vehicle at any time.
ENGINE OIL QUALITY AND VISCOSITY (OTHER THAN THE UNITED STATES AND CANADA)
NOTICE: Using oils of any viscosity other than those recommended could result in engine damage. When choosing an oil, consider the range of
temperatures the vehicle will be operated in before the next oil change. Then, select the recommended oil viscosity.
