Originally Posted by elp_jc
Based on several UOA reports I've seen, it's definitely inadequate IMO. And proof of that is BMW used to recommend oil changes every 3K miles when they were charging for service. And without ANY engine changes, as soon as they started including service in the purchase, the interval jumped to 10K miles
Not proof; just a conspiracy theory. Your argument also leaves out Europe and other markets that do still charge for service. How do you explain that?
Every other manufacturer in the world has also increased their oil change intervals. Some of these manufacturers charge for service; some don't. Subaru is one example. What's in it for them? Oil tech is also improving constantly. Shit, 10 years ago, most manufacturers were still dumping crapola dino oil in high performance turbo engines - Audi for one.