I've always used full synthetic oil in my snowblower, but even though I always run the carb dry, the first one gummed up, and I'd forgotten how terribly cold-blooded the factory carb is when new. They must have adjusted them for factory floor temps, before sealing the adjustment screw with slag. Anyway, it doesn't use any oil to speak of, it just smells terrible. I'd wait for the next gen Snow Joe, though, and even then I'd expect to replace the tiny lithium pack with a much larger one.
Oh, yeah: we also have a Black & Decker 1800 watt corded mini snowblower, and that works well in anything except extremely deep or wet snow. Pushing it can be a real workout, though. Still, if you can use a cord, it is much, much, much more powerful than the Snow Joe.
2013 "Brilliant Silver" SV with Premium and no QC, a 2009 Vectrix VX-1 W/18 Leaf modules, and 3 EZIP E-bicycles.
PLEASE don't PM me with Leaf questions. Just post in the topic that seems most appropriate.