Originally Posted By: KCJeep
M1 HM is good stuff but they have cut some of the goodies out of it, it isn't what it used to be on paper anyway.
I'd try the Pennzoil HM myself, more likely to slow/stop a leak than M1 IMO. Maxlife is excellent for leaks as well, try the 10w40 in Maxlife if you go that route.
+1 I am liking PHM. Check out my signature haha.