Quote:
Originally Posted by Vettezuki
Same story. Troy said three changes on full mineral oil, or a blend would be fine, with the zinc additive (like from Lucas). Perform at roughly 500 miles, 800 miles and 1,000 miles. Then full synthetic is fine. The issue is apparently synthetic, while objectively superior for shearing and heat tolerance, doesn't cling to metal surfaces at all the same as mineral oil. Or at least that's what I understood.
He said the three things that f up rings sealing properly are trying to do it on full synthetic, running boost before they're set, and of course overheating.
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They do make full synthetic break in oil. Also watch out because high zinc oils will kill your cats very quickly.