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Have a little over 400 miles on my C7 and the remaining oil life readout now says just 54% life remaining.
It was at 99% after driving a few miles. Anyone else see this issiue?
 

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Lots of people like to change their break-in oil at 1000 miles or so to get the little shaved particles out.

Did GM program this in to accelerate the first change?

If I were you guys, I would not worry about this at all unless it keeps on doing it even after you are at, let's say, 2000 miles.

By the way, there was another thread on this topic here several weeks ago. Use the search feature to find it.

Of course, if you ask 10 people about this, you might get 11 opinions because one may change their mind a few minutes after talking to you...
 
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I'm sorry I cannot source this and can provide only hearsay, but my salesman told me to expect the first oil cycle to be short because GM wants you to get that oil out sooner. After the first oil change, when the tech resets the Oil Life setting on the computer, it will begin its regular interval cycle.


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My dealer actually told me the opposite, run it until the life cycle reading is near the end. I had gone to the dealer at 2000 miles to have them change it, which the reading stated 65%, but they told me to wait because they do not use break in oil anymore. I waited until it stated 15% to change mine and at that point I had 6500 miles on it.

As to the OP, because the system monitors the oil quality, you may have had something in yours to cause the oil to degrade faster than mine, but obviously, that's just speculation.
 

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Remember folks that the computer / oil indication system looks at the way your car is driven / conditions and bases this reccomendation on that, so mileage is not the only factor taken into consideration.
 

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1,700 miles on mine and it reads 80%.

BTW, don't know if C7 is different but I certainly was under the impression the oil monitor in my CTS and SRX actually "samples"or "examines" the oil to come up with the percentage. I read somewhere that if I accidentally reset the oil measurement to 100% that I should then just drive it for about a hundred miles or so and it would revert to the correct reading based on the actual oil in the vehicle.

I just checked with the authority (my wife) and she said we were told by the dealer service manager last month when we had our Cadillac SRX in for an oil change that if we inadvertently reset the oil monitor to 100% on the SRX to just drive it a hundred or so miles and during that time it would revert to the correct reading based on oil sampling.

Also, for the CTS and SRX they won't perform the free oil change until the monitor indicates less than 20% or its been a year since the last oil change whichever occurs first. I don't know if that is a GM guideline or dealer policy. I believe that is the same for the C7.
 

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I just checked with the authority (my wife) and she said we were told by the dealer service manager last month when we had our Cadillac SRX in for an oil change that if we inadvertently reset the oil monitor to 100% on the SRX to just drive it a hundred or so miles and during that time it would revert to the correct reading based on oil sampling.
I certainly wouldn't want to make the mistake of disagreeing with your wife, but I think I'll try to find a definitive answer to this tonight.
 

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I have 712 miles and oil is 90% I plan on going for my 4 oil changes in my 2 year period regardless what miles I have. I will not have 24k in 2 years. I anticipate 14K in 2 years and yes I plan on having the oil changed 4 times because I paid for it in the purchase of this car. amen :D
 

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I certainly wouldn't want to make the mistake of disagreeing with your wife, but I think I'll try to find a definitive answer to this tonight.
Thanks, that would be great. You wouldn't be disagreeing with my wife since thats what we were told by the service manager so your good there. Coincidentally, we are leaving at zero dark thirty tomorrow morn for a thousand mile week long trip in the C7 so if you post the info I will be checking this thread when we get back.
 

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I have 712 miles and oil is 90% I plan on going for my 4 oil changes in my 2 year period regardless what miles I have. I will not have 24k in 2 years. I anticipate 14K in 2 years and yes I plan on having the oil changed 4 times because I paid for it in the purchase of this car. amen :D
Are you sure? Will your dealer change your oil (without charge) if you still show say 50% on your monitor and its been less than a year? My dealer wouldn't do that for the CTS and SRX and I'm pretty sure not for the C7 either. I didn't think the C7 deal was for four oil changes in 2 years no matter what.
 

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Are you sure? Will your dealer change your oil (without charge) if you still show say 50% on your monitor and its been less than a year? My dealer wouldn't do that for the CTS and SRX and I'm pretty sure not for the C7 either. I didn't think the C7 deal was for four oil changes in 2 years no matter what.
Boomer, its amazing how much dealer-to-dealer variation there is. My wife got her Caddy changed at 39% at two or three days over six months old.
 

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Boomer, its amazing how much dealer-to-dealer variation there is. My wife got her Caddy changed at 39% at two or three days over six months old.
Yes. I was wondering if its a dealer policy or GM guidance. Sounds like the former.
 

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Yes. I was wondering if its a dealer policy or GM guidance. Sounds like the former.
No, you were correct: it IS a GM policy for the Caddy free maintenance. What I was trying to say is that if your dealer is an advocate for you, you would be amazed at how easily they can get around red tape for you.

By the way, the first dealership we asked would not do it (they actually refused to do it unless the oil life monitor was less than 10%, and they would not agree to have the technician use seat covers, and put on a new pair of disposable gloves before getting in the car).

We now have a new dealership we call "our dealer". :)
 

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I have 712 miles and oil is 90% I plan on going for my 4 oil changes in my 2 year period regardless what miles I have. I will not have 24k in 2 years. I anticipate 14K in 2 years and yes I plan on having the oil changed 4 times because I paid for it in the purchase of this car. amen :D
I agree.
 

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Yes, wondering the same thing recently. Less than 500 miles and around 60 % ?
Either you drive it like you stole it or your car has issues? Just like Chip says it all will vary on how you drive the car....
 

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No, you were correct: it IS a GM policy for the Caddy free maintenance. What I was trying to say is that if your dealer is an advocate for you, you would be amazed at how easily they can get around red tape for you.

By the way, the first dealership we asked would not do it. We now have a new dealership we call "our dealer". :)
Thanks. So what about smajicek"s and 53Vette's belief that they are entitled to four C7 oil changes during the first 24 months no matter what the miles or oil monitor percent? They say they have paid for it and are entitled. Is that true?

Does GM guidance support their contention or are they reliant on dealer largess?
 

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Thanks. So what about smajicek"s belief that he is entitled to four C7 oil changes during the first 24 months no matter what the miles or oil monitor percent? He says he has paid for it and is entitled. Is that true?

Does GM guidance support his contention or is he reliant on dealer largess?
We have to consider that he is taking about Chevrolet, and you and I are talking about Cadillac. I heard through a grapevine that the Chevrolet plan is similar to what Steve said: you get four, use them wisely as you see fit. I can't confirm that for sure, however. Nevertheless, I expect that you can do as Steve suggests, as long as you have a good relationship with your dealer.
 

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I have 522 miles on my car and my oil is at 58%. Just seems a little odd to me.
 

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After a little digging, here is GM's description of their Oil Life System (OLS):

"Engine Oil Life System
Most Chevrolet vehicles are now equipped with the Engine Oil Life System (OLS). This system actually senses your vehicle’s speed and engine temperature and can continuously monitor operating conditions. This helps determine when it’s time to change the oil.

This Oil Life System (OLS) can actually monitor your personal driving habits and your area’s climate conditions to let you know precisely when to come in for an oil change. When the OLS light comes on, you come in. It’s that simple. It’ll help you save money and help reduce oil waste.
" Oil Change & Oil Life System | Chevrolet
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So, as I suspected, the OLS is an algorithm that integrates a set of engine and environmental factors as you drive the car, and provides an estimate of oil damage.

A second reference, GM Oil Life Monitor System Frequently Asked Questions, states that "There is no actual oil condition sensor." - meaning there is no physical measurement being made of oil quality. http://assets.cobaltnitra.com/teams...5efa6b30/975c7820afba1004895010145efa6b30.pdf
 
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