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I know there's been some discussion about this already, but I can't find anything definitive. I just purchased a new 2016 C7 1LT. The owner's manual says to have the oil changed at the first 500 miles, but there's some ambiguity in the manual. It's not a Z51 or Z06. The salesman said to wait until 4,000 miles for the first maintenance. I don't want to screw things up. What do you suggest?
Change it when the Oil Life Monitor (OLM) tells you to. The OLM has a sophisticated algorithm developed by GM engineers which monitors many factors to determine oil life.
My dealer ask for the 500 mile oil change, I had something elese done to the car at the dealer so I said go ahead and change the oil. At least now I dont have to worry about it for what the dealer says 5000 miles.
I know there's been some discussion about this already, but I can't find anything definitive. I just purchased a new 2016 C7 1LT. The owner's manual says to have the oil changed at the first 500 miles, but there's some ambiguity in the manual. It's not a Z51 or Z06. The salesman said to wait until 4,000 miles for the first maintenance. I don't want to screw things up. What do you suggest?
Originally Posted by jim spitzer
My dealer ask for the 500 mile oil change, I had something elese done to the car at the dealer so I said go ahead and change the oil. At least now I dont have to worry about it for what the dealer says 5000 miles.
Only a dry sump (Z51, GS, Z06) needs changing at 500 miles due to the original fill "possibly" causing oil foaming "if the engine is operated at sustained high speed." Then they pay for the extra change. In a dry sump that oil foam can burp with the air in the dry sump tank and go into the air intake and oil filter. Some folks have found oil dripping on the graound from the filter! In a wet sump, there is no burped air so it's not needed and GM won't pay for the extra.
Changing oil at a specific mileage went out some years ago when they developed the much more sophisticated OLM (Oil Life Monitor.) In addition to miles driven it uses: number of starts, how hot the oil gets after starting (2 mile trips to the store will cause it to request a change sooner,) time and other variables. If you put only 3000 miles on your car in 12 months it will say change anyway!
Perhaps the dealer meant it may be about 5000 miles that you'll see a message to change. If he really meant 5000 miles, find another dealer!
Also, if you you signed up for Onstar. You'll get monthly e-mails on your car status plus e-mails when attention is required. Like maintenance and recalls.