...About using Synthetic oil in a 'Brand-New' Built engine. Where part of the Breaking-in Process is to 'Seat' the piston rings; I have (only) read that Synthetic Oil does not allow the 'wear-in' that is needed to properly seat the rings. I imagine one would break-in an engine(seat the rings), on a mineral based oil, and then switch to a Synthetic. Any other comments?...
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