Quote:
Originally Posted by MOREPOWER
Effects of Shearing
Its been documented that M1 5w-30 can shear to something close to 5w-20,
It was my experience with it. many believe (There have been tests done to confirm it although on only one Extended life grade) its now a group III base stock oil, maybe the reason for the price drop at "China mart"
15k on one, and none on the Beetle? Nice.
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Don't quite follow you. What price drop? I've been using M1 5W30 for over 300,000 miles in my '97 Ford F150, and using the Extended Service Mobil 1 5W30 since it first hit the market a couple of years ago. In between the Beetle and the present Ford I also had some other vehicles including a Toyota Tercel that I sold at ~ 100,000 miles and a Nissan pickup truck that i sold at ~125,000 miles. Same deal with all of them, M1 and M1 filter, changing them at 10,000 mile intervals, now extended to 15,000 mile intervals, except, as I said, the somewhat leaky Beetle which just got oil added to it. All these engines have performed flawlessly.