Originally Posted by jobrien
The feedback on HM, that I've read so far, seems to be good overall. The part that makes me hesitate is that if these other oils clean off everything, then does that increase my chances of having more leaks form because there's nothing there to block them off anymore?
The only thing it's able to clean off is carbon deposits. If you had carbon deposits on seals or your rings and they are removed, it would make absolutely zero difference as far as oil seal goes.
Piston rings exert about 5-10psi of spring tension seal against the cylinder wall by being forced outward through the thousands of PSI the compression stroke creates ontop of the piston.
As far as cleaning seals, it would help lubricate and swell the rings as well, which I mentioned in my post above.