Oil and Change Oil Light/Onstar Reports
 

I just changed my oil. I remember the debate as to whether or not to pay attention to the DIC / Onstar for it, so I thought that I would wait and see what the outcome of this is. Let me tell you, go with what we were all taught as kids and forget about the damned light/Onstar report:

https://i256.photobucket.com/albums/...5/DirtyOil.jpg

I don't think the pic fully shows the effects, but it isn't pretty. He's happy with a full belly of Mobil 1 and a new Mobil 1 oil filter now. He won't go over 5,000 miles again without a change.

Oh, that was mostly HWY driving with the exception of yesterday and a trip through the wilderness area 2 weeks ago.

RE: Oil and Change Oil Light/Onstar Reports
 

Minecomes out dark golden brown at 6500-7000 miles....

RE: Oil and Change Oil Light/Onstar Reports
 

Mine is done every 3k. It will get done this week while I have the time off before lots of driving at the end of the month.

RE: Oil and Change Oil Light/Onstar Reports
 

Every 3K miles here on all my cars with Amsoil synthetic Series 2000 or Signature Series.

RE: Oil and Change Oil Light/Onstar Reports
 

It was almost 8,000 miles before it told me to do it. Just wanted to see what how it worked. Like I said, every 5,000 with Mobil 1 normally.

RE: Oil and Change Oil Light/Onstar Reports
 

Mine's a lease. Have 40K mi. on it. Light just came on for the 3rd change... Guess that averages out to about 13,000 between changes. If I was going to keep it for years and put 150,000 miles on it, I might stick to 5,000 to 7,500/change. But with the 100,000 mile powertrain warranty, if you follow the light, you're covered for whatever happens to the engine because of GM's light/OnStar monitor.

RE: Oil and Change Oil Light/Onstar Reports
 

I found that the H2 computer was dead on. On the H3 we are changing the oil about every 4000 miles.

RE: Oil and Change Oil Light/Onstar Reports
 

I agree with Rhill, forget On Star, every 5k with Mobil 1 synthetic and filter. Your truck will love you.

after oil change, I got onstar diag. message that an after mark device plug was connected. ??? no idea...