What fluids should I run in my G1 Outlander for plowing?

I decided this year to plow my drive (400 hundred feet or so) and got tracks for my 2010 Outlander 650 Max since I have a big hill right in the middle of that.

My question for you more experienced guys is what fluids should I be running? Should I do any service mid winter? Would you suggest I keep any spare parts in hand (keep in mind I do have a dealer 30 minutes away if I need to order anything, but I also need to plow my drive or else it isn’t getting done)?

Is the 0W-40 4-stroke Amsoil better than the syn Can-Am oil?

Thanks for any input you guys have. Let it snow!