Re: Merc. 2 stroke oil
PennZoil synth blend at Wal-Mart is probably better oil, and about half the price. From what I've heard (listening for years) the Wal-mart (Super-Tech) outboard oil is as good as any Dino Oil.
I use Pennz full synthetic in mine, probably an overkill, but it's an overtuned XR4 that knows only idle and WOT.
hope it helps
John