what oil

[bigstothel]

i have an 02 sierra denali with the 6.0 liter v8 70k on the clock

what weight oil should i use

[svensk]

5w30?

[dewfpo]

When you say what oil? Do you mean: weight? brand?, type (dino vs. syn)?

 

The weight GM recommends should be stamped on your oil filler cap.

 

DEWFPO

[MS3DALE]

From the '02 owners manual.....

 

Document ID# 737239

2002 GMC Truck GMC K Sierra - 4WD

 

Gas Engine Oil Quality

Oils of the proper quality for the vehicle can be identified by looking for the STARBURST symbol. The STARBURST symbol indicates that the oil has been certified by the American Petroleum Institute (API), and is preferred for use in gasoline engines.

 

Engine Oil Viscosity

The recommended oil viscosity is SAE 5W-30.

 

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.

 

Engine oil viscosity (thickness) has an effect on the fuel economy and the cold-weather operation (starting and oil flow). Lower viscosity engine oils can provide better fuel economy and cold-weather performance. However, higher temperature weather condition require higher viscosity engine oils for satisfactory lubrication. When the temperature is consistently above -18°C (0°F), SAE 10W-30 can be used. SAE 20W-50 or oils of other viscosity rating or quality designations are NOT recommended for use in any Trucks at any time.

 

 

Document ID# 737239

2002 GMC Truck GMC K Sierra - 4WD

[burgundyz71]

Use 5w30 of Dino or Synthetic and it will be fine.