owc6

What's nuts is that no one on this thread, or any other one that I can recall, says it magically goes bad on day 366. You are the only one even implying that. What people keep telling you is that if ever have an engine failure while under warranty, you better have records that prove you have complied with GM's requirement of changing your oil when the OLM tells you to, or at a minimum once a year.

This does not mean the dealer has to change the oil; it could be any service dept, or yourself. As long as you have receipts that show Dexos-approved oil at or around the 0% or one-year-mark, you are compliant.

Whether anyone approves or thinks GM's requirements are bunk is immaterial as long as you are under warranty.

jimmie jam

I'm trying to remember in the last decade+ when I saw a thread on "my engine just blew up" and GM denied warranty because I didn't change the oil in twelve months but did after thirteen months+-.

owc6

Methinks you didn't read what I actually posted.

04TRCorvette

Kind of makes sense. If you let your car set for a year it would have been the full 12 months. But you drove for 3000 miles so chopped off a month so it was 11 months. I imagine they are being conservatives on the calculation of oil life. Better to change a little early then let bad oil running through the engine. And time can degrade oil. lol not sure how much though or important it actually is.

Gearhead Jim

I don't recall seeing any threads like that, but people who fail to comply with the warranty requirements and then get stuck with the repair bill, usually don't brag about it.

"Absence of proof is not proof of absence."

montanaman

Does anyone know if disconnecting and reconnecting the battery resets the OLM? I'm trying to figure out how long the oil has been in my 2017 that I just got. The car has been around almost 2 years and has had a couple new batteries. After 2500 miles the OLM is at 65%. If the meter is time sensitive I would think it would be telling me to change the oil by now. Pretty sure the dealer never did in the 2 years he was sitting on it.

owc6

Just changing the battery isn't going to affect the OLM.

If you remove the battery long-term???? I don't think anyone has posted here about that. I'm assuming you have your service records, so a 7000 mile (or one year) gap between oil changes is surely going to satisfy everyone.

Bavaria

However, I don't think those failing to comply with the OLM, as I eventually will, will be eliminated from 'warranty requirements' if problems with the electrical systems, transmission, differential, etc. occur.
As I previously posted, in well over 50 years of owning dozens of cars, I never had one that exhibited an oil related issue.

Gearhead Jim

owc6

This thread is about possible engine-oil related warranty issues. Nothing else.

I give up.

Patman

If a dealer has a car sitting on it's lot for a long time and then finally sells it, I'm pretty sure they are going to reset the OLM to zero so that the new owner doesn't drive off the lot and then get a change oil message a week later. Your car doesn't magically have an OLM that is ignoring the one year time interval. They will all hit zero at or before the one year mark since the last reset point, no matter what.

Foosh

That's exactly right. Even though a car sitting on a dealer lot for a year should ideally have the oil changed and the OLM will be at 0%, dealers don't have to worry about warranty denials. The B2B warranty starts from the day a car is sold to it's first new registered owner. Thus, most just reset them.

ByRiver

Does the vehicle record you resetting the OLM? And I asked before, does the OLM start showing negative numbers once it hits 0%?

jimmie jam

Of course they would not brag about it after the fact but they will post about the failure before finding out that it won't be covered. I've seen that here many times over the years.

NSC5

ByRiver wrote: "Does the vehicle record you resetting the OLM? And I asked before, does the OLM start showing negative numbers once it hits 0%?"

Unless they have changed the system recently it will not show negative numbers after it counts down to zero, it just goes down to zero. GM initially recommended a really long interval for my 2008 CTS (which required synthetic oil) and I didn't care for that long of an operating conditions interval so I would change the oil/filter at around the 50% OLM mark and not reset and then do another change and reset the life when it got to zero. A couple of times I left it at 0 for a week of light operation and it never went lower. After about a year GM issued a mandatory reprogramming of the OLM system (to help address problems with timing components failure) which significantly cut the operating life between changes and after that I began using the OLM in the normal fashion.

I haven't tried it since GM changed to a different diagnostics interface but the old tech 2 could retrieve some OLM data and because the new one uses calendar time as one of its data points then the number of days since the last reset will be stored within the OLM routine and would be retrievable.

Bill Dearborn

Not sure why this is bothersome to you. You were getting ready to change it anyways. So what if the C6 said you had 40% oil life left after a year when you changed it Vs the C7 saying you only have 2% left after 11 months. By the time you get to 12 months it will register zero and you will change it as you usually do.

Bill

Skid Row Joe

You've just identified the bogus folly of the olm.

​​​​​​​According to many fruitcakes here, your engine should have locked up on Day #366 of your oil fill. LOL!

Patman

Not one single person on here has ever said that oil goes bad on day 366, that's just your warped interpretation of what people are saying. What people are really saying is that if you don't change your oil every 12 months, GM will not honor your power train warranty. But reading comprehension is obviously not your strong suit is it?