Thread: I made the mistake.

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I stand corrected Mike and humbly butt out.

Originally Posted by 36 sedan

I stand corrected Mike and humbly butt out.

36 sedan, you shouldn't feel bad. The whole motor oil arena is such a tangle, and there are a lot of "experts" who disagree on what's right, and also what's forbidden, too. Mobil answers the question about synthetics for break in with a statement about having much closer tolerances on new engines today, much cleaner assembly, etc, etc and ending with rings don't need any special "seating", saying synthetics are fine. I've never really jumped on the full synthetic band wagon, and while I agree with their logic on starting with synthetic I also see no problem with using a high quality non-synthetic for initial break in, and then if you choose to, swapping over to the synthetic. What can it hurt? For me, I also see no problem with continuing forever with non-synthetic, or with a good synthetic blend. Of course, the flat tappet cam issue is there for either path, and must be addressed.