When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Done at 7500 miles 6 months in. Coming up on 15k in the next couple months. Don’t see any reason to change it earlier than the service interval for time or miles unless periodic checks on the dipstick reveal its burning or leaking. I trust the research done with corvette team racing and on prototypes. Please drive your cars people, don’t neglect them.
Do you remember what your Oil Life Monitor reading was when you changed it at 7500 miles? It would be interesting to know if 7500 miles is still the maximum mileage if you put more than 7500 miles per year on your car.
I have a '23 but have read enough threads/posts about machining debris getting on the internal solenoids and causing problems that I had the oil/filter and DTC filter switched out at about 4100 miles. I'll do it again at the 7500 interval per GM's service schedule. For me it's relatively cheap piece of mind and good preventive maintenance.
I was just shy of 3000, about 28XX miles at the end of summer putting mine on life support and come spring I will change the oil and filter for the first time. Will do it again at the 7500 recommended interval at the end of the season, or if not at 7500 then I will do it in the coming spring for that season.
Changed at 1200ish miles at around 1 year. Transmission flush and filter change. Still have the free service available I’ll do before it expires. Then I will do the oil every 2 years because I won’t hit the recommend mileage intervals. Then I will stick to the service manual for transmission fluid and filter changes. These intervals are based off of numerous factors I’ve posted in one of my own threads.
Changed oil and trans at 2500+/- just in case any metal happened to be floating around after break-in. Really cheap since GM paid for it and dealer offers free oil/filter changes for life so did the 2nd @ 9600 miles
I changed the oil at 7500 miles (along with the transmission filter). The car was 9 months old and the oil life indicator was at 2%.
Shows the OLM is using more than miles! Still had 2% oil life left! Actually it uses total engine revolutions (like an airplane engine,) oil temp time after cold starts, time etc. Otherwise are those good highway miles or many starts, acceleration city miles?
Yep miles and time was all we had back in the day but today OLM will tell you when to change. Can't miss the messages as they display on the right of the screen when you start with less than about 10%. Then you must press OK to have it go away!
I changed the oil at 7500 miles (along with the transmission filter). The car was 9 months old and the oil life indicator was at 2%.
This shows that the 7500 miles is still part of the equation as well as time. I suspect that if you drive your car often and put a lot of highway miles on your car the OLM would still tell you to change the oil at 7500 miles in less than a year. But the OLM will tell you to change your oil sooner than 7500 miles if driven hard or on short trips.
Changed at 1200ish miles at around 1 year. Transmission flush and filter change. Still have the free service available I’ll do before it expires. Then I will do the oil every 2 years because I won’t hit the recommend mileage intervals. Then I will stick to the service manual for transmission fluid and filter changes. These intervals are based off of numerous factors I’ve posted in one of my own threads.
The recommended intervals for the oil is 7500 miles OR 1 year, whichever comes first. If you only change your oil every two years you most likely will lose your warranty.
Changed at 1200ish miles at around 1 year. Transmission flush and filter change. Still have the free service available I’ll do before it expires. Then I will do the oil every 2 years because I won’t hit the recommend mileage intervals. Then I will stick to the service manual for transmission fluid and filter changes. These intervals are based off of numerous factors I’ve posted in one of
my own threads.
I'll repeat what I have posted before! Those 7500 miles are BS re engine oil change in the C8 owner's manual IMO. I think it's strictly poor writing! In fact, that is NOT what is controlling! The Owner's Manual clearly says the OLM is controlling!
My two C7s and C6 with OLM did not mention miles. They said do it when the OLM says. The C7s since it kept track of time for you and minimum it would say change before 12 months. Like the C8 would it not let you forget what my 1st Vette, a 1988 said, which was XXX miles OR 12 MONTHS WHICHEVER OCCURS FIRST. You're changing at min every 12 months for the dilution by harmful blowby and depletion of additives in the oil NOT that it's worn out!
In fact my 1993 Vette before the OLM, went even further (see pic from owner's manual below.) It said IF MOST DRIVES ARE LESS THAN 4MILES change oil every 3 months or 3000 miles. The reason is the worst thing for oil and engine is cold starts. Until pistons expand from ~2500 combustion temps lots of the fuel rich combustion mixture passes the rings. A key product of combustion is water. Water forms with sulfur in oil and gasoline to form sulfuric acid (other bad stuff can occur as well). That eats metal when the engine parts is off.
The OLM considers oil temp after cold starts and IF it does not get hot enough long enough to evaporate much of that water it will shorten the 12 months to a lower time!
BUT a number of folks know better than GM engineers and do their "Own Thing!" Heck some oil says it's good for 25,000 miles and so for a "garage queen" why ever change? Silly!
I find it interesting that some of the same people that think it is beneficial to change the oil at an earlier mileage than what the manual requires also extend the time interval to longer than what the manual requires.
Actually, the Owner's Manual(s) never say to change the oil at 7,500. The most they say is to check the oil life monitor, and change "if needed" (As Jerry U has pointed out a few times). The manuals do say to change the oil at 1 year. But we also know that the OLM times out at 1 year (if not sooner depending on other factors) irrespective of miles. So, simply put you just change the engine oil when the OLM says so. And the definition of changing the engine oil "early" is changing it before the OLM indicates that it needs to be change. There is an exception to change the oil at 3000 miles if the OLM is accidentally reset. Which suggests to me that under some worst case conditions the OLM might indicate an oil change at 3000 miles.
I change it when the computer says 5%. I don’t go by miles.
Yep miles was never a good indicator. But all we had for my 1st two Vettes, a 1988 and 1993. Just that some didn't read or want to believe they both said must change every 12 months regardless of miles.
BUT my 1993 went a step further. and important for "garage queens." It states IF most drives are under 4 miles change oil every 3 months or 3000 miles, whichever occurs first! The OLM does even better by measuring oil temp and time after cold starts. And IF it does not get hot enough long enough to evaporate much of the water of combustion that passes the cold pistons when starting it WILL LOWER THAT TIME FROM 12 MONTHS. It will lower for some other reasons as well.
When you think about it, when using miles, where those good highway miles with fewer starts or bad city miles with many starts, acceleration, making short trips etc.
From my 1993 Owner's Manual. Some may remember for all cars Jiffy Lub and some dealers would put a small sticker on the inside of your windshield that added 3000 miles to the Odometer reading after and oil change and 3 months! Some thought just trying to make money! Partly true but justified as they did NOT know how you drove the car!
Changed mine at 600mi. Cut open the filter and inspected the pleats. I recommend an early change. If you can do it yourself, it is relatively inexpensive and there are no draw backs. Although I don't believe it would be the end of the world if one waited until 5-6kmi. Most of us think we will keep these cars for longer than we really do and the main beneficiary to our extra care is usually the next owner.
Shows the OLM is using more than miles! Still had 2% oil life left! Actually it uses total engine revolutions (like an airplane engine,) oil temp time after cold starts, time etc. Otherwise are those good highway miles or many starts, acceleration city miles?
