Quote:
Originally Posted by qwq
"it shears to god knows what within 3500 miles"
What does that mean?
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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"
Quote:
The man in TC101's article was right - too conservative if anything. Mobil 1 is great. I've been using it for many years. I change it only at 15,000 mile intervals. My Ford F-150 now has over 300,000 miles now and still - knock on wood - runs like new. Likewise in my previous vehicles. In my old VW Beetle I never changed the Mobil 1 oil at all, just replaced what fell out. Beetle also hit 300,000 miles before rust killed it, the engine (and transmission) still running like new.
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15k on one, and none on the Beetle? Nice.