Fleabay oil says high viscosity 100 cst. No indication of summer/winter. Not sure of the cst measurement system though...

If it helps there's a chap on ADV who reckons Scottoiler blue is equivalent to 20W - 50. I've not tried that and have little knowledge of what the numbers really mean in real life terms so will stick with the chainsaw oil.
I'm using a single nozzle tucked into the sprocket guard and held in place by cable ties. There's pics on an old thread somewhere.
Good luck on the viewing tomorrow,
S
(On an aside, if you do get the 800 and are looking at clocking up some serious commuting miles it may be worth considering a 17T front sprocket off the 650 twin to save on the go juice, it's a direct swap for the 16T on the 800. Though now i suppose i'm getting into the mahoooosive field of upgrades/farkle! )