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Thanks for the info. My concern is switching from the regular oil to the synthetic at this mileage. Thanks, Steven



No worries whatsoever, don't give it a second thought.
Put in your favorite brand of synthetic 5w20.

If you're mostly concerned about leaks, consider:
5.7s really don't have any "gaskets" per se'.
99% o-rings. The closest thing to a gasket it has is the oil pan, and it is molded rubber/a permanant part of the windage tray. As long as it doesn't leak with conventional oil, it won't with synthetic either.

Rich H.

Esse Quam Videri