15,000 mile oil change...

[wpage]

You should reset it each time you change oil...
There is no magic to it. It is just a odometer reader.

[HumbleAg]

Originally Posted by wpage

There is no magic to it. It is just a odometer reader.

I believe that is incorrect. The oil life system monitors driving conditions (temperatures, speeds, other factors?) and calculates oil life for the vehicle. While it typically goes well past what traditional recommended oil change intervals have been (and the 3k that the Jiffy lube guys want to stick you with), following the oil life system won't void your warranty.

There was a GM engineer on here long ago who had some facts about the testing GM did for this system, but it is too late in the evening for me to try to look it up.

That said, I change mine every 5000 miles just because I'm a bit old school (and it gives me time to bond with the truck).

[fourfourto]

I dont think driving conditions are used because when towing 5,000 miles the % was the same as normal driving.?

[HumbleAg]

Wow, lots of stuff on this if you Google it. Here's a blurb from GM website:

What is the GM Oil Life System?
The GM Oil Life System is a computer based software algorithm that determines when to change oil based on engine operating conditions. There is no actual oil condition sensor. Rather, the computer continuously monitors engine-operating conditions to determine when to change oil.



I don't really know what it means, but my point was that it isn't just an odometer monitoring thing (like my wife's T&C van has).