Quote:
Originally Posted by duffyatkinson
Based on my experience, ,and on some anecdotal evidence from a few other members, after the switch from dino to a full synthetic watch your oil condition closely. The detergent action of the synthetic formulations really do a good job cleaning sludge deposits as a result of dino use. After 2,500 miles on my wife's '03 4Runner V6, the oil was filthy. It was changed and has been quite clean ever since.
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That has been my experience with synthetic oil. It will clean up an engine in short order and keep it clean.
I made the switch to synthetic at 90K with no ill effects whatsoever.