[H3wannabe]

<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by wannabeH3:
here is the way i was told, if you are a regular oil guy and switch to synth late in a cars life the cracks and fissures that are ok with regular oil wont be ok with synth, and your engine could just end up burning oil or developing leaks.... i know there is scientific evidense on what oil to use but i mostly agree with f5fstop's response </div></BLOCKQUOTE>

That is correct and I have experienced it. I had an old camaro that run regular oil for most its life. It has a lot of miles on it. I got the "great idea" to switch to synthetic and had oil leaks all over the place that I did not have with regular oil. And it burned it like crazy. Back to regular oil...no issues.

I have built a few hi-perf engines for use in classic cars and I never start with synthetic as it can prevent/prolong the rings from seating. However, I always switch to synthetic after break-in (2nd oil change). Not sure how this may or may not apply to new engines from the factory.

H3wannabe