Quote:
Originally Posted by tjts1
Like I said before, once a year which comes out to 8000-15000 miles depending which car we're talking about.
Just about every OHC engine manufactured in the last 20 years has flat tappets. They don't experience excessive wear with synthetic. I'm not sure where this myth came from either.
There is absolutely no evidence to suggest that using synthetic oil in an M103 with long change intervals causes excessive wear or oil leaks.
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You're kidding right?
Ask anyone who owns a domestic, or a Porsche owner what happens when flat tappet followers meet low ZDDP synthetic.
Your anecdotal evidence based on 37K miles on a vehicle you've owned a few years is faulty. There's a reason Brad Penn, Valvoline, et. all are coming out with "vintage" formula oils, to address exactly what I'm talking about.
rjp