Oil Life
Safety Car
Joined: Aug 2004
Posts: 3,966
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From: SouthEast PA
Unmodified C8 of the Year 2021 Finalist
2018 C7 of Year Finalist
Safety Car
Joined: Aug 2004
Posts: 3,966
Likes: 1,295
From: SouthEast PA
Unmodified C8 of the Year 2021 Finalist
2018 C7 of Year Finalist
Race Director
Joined: Sep 2000
Posts: 11,142
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From: Missouri City, TX
Safety Car
Joined: Aug 2004
Posts: 3,966
Likes: 1,295
From: SouthEast PA
Unmodified C8 of the Year 2021 Finalist
2018 C7 of Year Finalist
Why is this important? The obvious was is there something wrong for at least the OP and my C7 and others noted in threads elsewhere? The not so obvious is what are the warranty issues if the computer records run time on our C7s AFTER the Oil Life Moniter gets to 0% without being reset. In that situation you better have great documentation if someone other that a Chevy Dealer does your oil change. Not to be an alarmist here, but I have you been reading threads on the blown LT1s in the C7.
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Melting Slicks
Joined: Sep 2013
Posts: 2,299
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From: Long Island New York
It looks like 3 factors are in play in the oil life monitor: time, mileage and number of stop/starts.
My C7 was built 2/20 and delivered to me on 3/29. It now has 1,300 miles on it and oil life left is 41%. I expect to be able to put another 300-400 miles on it before I change the oil and put it away for the winter at Thanksgiving.
My C7 was built 2/20 and delivered to me on 3/29. It now has 1,300 miles on it and oil life left is 41%. I expect to be able to put another 300-400 miles on it before I change the oil and put it away for the winter at Thanksgiving.
Race Director
Joined: Jun 2005
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From: Phila Suburbs 2023 C8 & 2013 650ix
I don't know for sure but I doubt that the computation takes into account the one year time limit and suspect that it's the same computation as for the C6. And if it did, it would not show anything relating to that criteria until you passed that limit. So say you are at 50% at just under one year, it would jump to 99% as the year limit passed. Don't think so.
Safety Car
Joined: Aug 2004
Posts: 3,966
Likes: 1,295
From: SouthEast PA
Unmodified C8 of the Year 2021 Finalist
2018 C7 of Year Finalist
I don't know for sure but I doubt that the computation takes into account the one year time limit and suspect that it's the same computation as for the C6. And if it did, it would not show anything relating to that criteria until you passed that limit. So say you are at 50% at just under one year, it would jump to 99% as the year limit passed. Don't think so.
Unless Talon90 chimes with a difinitive answer in we all 'don't know for sure'.
Last edited by CRABBYJ; Sep 19, 2014 at 08:40 AM.
Le Mans Master
Joined: Jun 2000
Posts: 5,555
Likes: 9
From: Indiana
If it considers the date, you could never be at 50% after a year .. Every day would affect oil life slightly
I'm guessing the date is now factored in .. the easiest way to tell would be to check the oil life %, park the car for a month, then start it up and check the percentage again .. if it changed a few points, then the date is being considered .. but who wants to let it sit for a month?
A big factor in the calculation is how the car is driven. A lot of short trips will kill oil life .. Letting it get fully warmed up each time it's driven extends oil life. Hard driving and excessive oil temps would also affect life adversely ..
Mine was born 6/30, is at 1600 miles and 80% life remaining. No short trips, ever. At least 20-30 miles every time it's driven ..
I'm guessing the date is now factored in .. the easiest way to tell would be to check the oil life %, park the car for a month, then start it up and check the percentage again .. if it changed a few points, then the date is being considered .. but who wants to let it sit for a month?
A big factor in the calculation is how the car is driven. A lot of short trips will kill oil life .. Letting it get fully warmed up each time it's driven extends oil life. Hard driving and excessive oil temps would also affect life adversely ..
Mine was born 6/30, is at 1600 miles and 80% life remaining. No short trips, ever. At least 20-30 miles every time it's driven ..
Race Director
Joined: May 2008
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From: Manheim Pennsylvania
Mine was built mid April. At 1,600 miles my oil life is below 58%. Calendar percentage is about 8.33% per month. I have my car five months, deducting percentage would leave about 58% oil life remaining. Looks like calendar time is also figured into remaining oil life.
Last edited by Larry/car; Sep 21, 2014 at 06:03 PM.
Team Owner
Joined: Aug 2007
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From: I live my life by 2 rules. 1) Never share everything you know. 2)
St. Jude Donor '11-'12-'13, '16-'17-'18
VIN 11822, built 1/9/14 and M7
Took around 7000 miles of mixed driving to 20% oil life indicated.
Left for NCC 20th Anniversary with 7800 miles showing and 85% oil life indicated. Changed at 12,457 (mostly highway) with 16% showing
Took around 7000 miles of mixed driving to 20% oil life indicated.
Left for NCC 20th Anniversary with 7800 miles showing and 85% oil life indicated. Changed at 12,457 (mostly highway) with 16% showing
Safety Car
Joined: Aug 2012
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Is total engine run hours a selectable display parameter on the C7? It is a handy data point that shows up in some GM vehicles like my GMC Sierra equipped with the diesel option. Possibly your C7 spent a lot of time idling at some point in the final test/dealer prep cycle?
There was a pretty good article in GM's techlink a few years ago explaining the various parameters used in the equation to calculate oil life remaining. Ambient temperature was a big factor because idling in cold weather with engine below normal operating temperature is a large negative factor.
There was a pretty good article in GM's techlink a few years ago explaining the various parameters used in the equation to calculate oil life remaining. Ambient temperature was a big factor because idling in cold weather with engine below normal operating temperature is a large negative factor.
Team Owner
Joined: Aug 2007
Posts: 136,140
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From: I live my life by 2 rules. 1) Never share everything you know. 2)
St. Jude Donor '11-'12-'13, '16-'17-'18