I don't care what the marketing on the bottle says, or what the oil manufacturer says. The additives in oil are a depreciating asset. Also, the OLMS in any GM vehicle is a joke. Until it does an actual chemical analysis of the oil, it's just basing it's "best guestimate" on a bunch of inputs and algorythm's. We would joke about it at the dealership.
That's my vice. I'll spend on it. I don't have many others... Having seen enough mistreated cars come through the service lanes, basing their oil changes on the OLMS, what a bottle tells them, or what some marketing campaign claims, I'll stick to my regimented PM process. I gaurantee any engine in my fleet of vehicles will see 200k at a minimum. Which in the long run saves major money as driving them until the wheels fall off and I'm not having to replace engines or cars (with another car payment). How do I do that? Regimented continual preventative maintenance, which includes oil changes. That extra little cost now to change the oil, saves me big in the long run.
Some of you would cringe if I told you didn't even make it to 1,000 miles on the Mobil 1 in the GTO between changes...
Heck, on the GXP, I'd have changed my oil 3 times, maybe 4 before the OLMS would suggest it. My selling the GXP before 100k was also a strategic measure to ensure I wasn't nickeled and dimed to death with that car as that was already becoming commonplace at 80k. I just didn't want that headache.
