Originally posted by tktrain:
The synthetic is so slippery it will go right past the seals.


the reason is the detergents in full synthetics do a much better job of cleaning out the crap that "assist" older engines with less good(bad english, i know) seals. when all this crap is swept away the old seals sometimes are not able to properly and/or effectively perform their job because all that crap was a barrier for the oil. a high mileage engine with good seals will have no problem with leaking at all.

00 black/tan svt, #2052 of 2150, born 2/1/00 formerly known as my csvt "Nothing in the world is more dangerous than a sincere ignorance and conscientious stupidity." -Martin Luther King, Jr.