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DonandBonnie · 01-01-2007, 03:23 AM

My new 2007 Silverado with the Duramax does not specify mileage intervals for oil changes. Instead there is a dash board display that shows a percentage of the engine oil life remaining. I currently have about 725 miles on the odometer and the display shows 94% of the oil life remaining.

Does anyone know how this system works? If the display percentage is determined by reading the quality of the oil, then perhaps a synthetic that allows extended oil changes might be in order. If however it is only geared to the odometer, then any good grade oil would probably work.

The truck comes with a one year free subscription to Onstar. In addition to the emergency services available, they send me a monthy email with diagnostic checks on the truck and will call immediately if they detect a serious problem that requires immediate attention. On my first mileage check, I got 15.3 MPG.

01-01-2007, 03:23 AM	#1
DonandBonnie Montana Master Join Date: Jun 2006 Location: Madison Posts: 1,239 M.O.C. #5906	Duramax Oil Changes My new 2007 Silverado with the Duramax does not specify mileage intervals for oil changes. Instead there is a dash board display that shows a percentage of the engine oil life remaining. I currently have about 725 miles on the odometer and the display shows 94% of the oil life remaining. Does anyone know how this system works? If the display percentage is determined by reading the quality of the oil, then perhaps a synthetic that allows extended oil changes might be in order. If however it is only geared to the odometer, then any good grade oil would probably work. The truck comes with a one year free subscription to Onstar. In addition to the emergency services available, they send me a monthy email with diagnostic checks on the truck and will call immediately if they detect a serious problem that requires immediate attention. On my first mileage check, I got 15.3 MPG.