TrailBlazer 2WD L6-42L VIN S Engine Oil Viscosity
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.
