Originally Posted By: Linctex
Originally Posted By: Urshurak776
He says we are ruining engines going longer than 10K. Maybe he's right?
Back in 1985 when all we had was 5-6 oil brands and all were API rated SD/SE or CC/CD, I'd say he's probably right.
Not any more.
His points mirror mine. Quite simply, the thin oil, coupled with long oil change intervals resulted in a large number of balancer and timing chain issues for GM. The reason: High levels of particulates accelerate chain wear.
BMW found much the same. In fact, BMW went to very high viscosity oils in some engines to help eliminate the high wear rates in those engines with extended drain intervals. While the high viscosity helped, it did not solve the problem.
Oil changes are downright inexpensive. The total cost of the additional, more frequent oil change interval is a viable form of long term insurance. I'm still driving my 2003 Jag, with 170K miles, on a 2.5L V6 that is known for spinning rod bearings at 100-120K. I don't expect any issues, as I change frequently, with M1, 5W-40 TDT. An oil far more robust and more viscous oil than the OEM requirements. And I hit redline multiple times daily.