I use the new 100% synthetic Pennzoil TW3-W (all of the bottles don't
say this, but Pennzoil assured me it is rated that way) in my 2 stroke
dinghy motor and it seems to smoke and smell less than the other stuff.
Of course this costs twice as much as the regular, but hey, it's a
boating expense and doesn't really count, does it?

Capt. Jeff