It does not hurt to add oil to your gas in cold weather. We do it all the time when the temp drops but normal only when it gets below –20. Just a little extra, like 2 oz per 5 gallons does the job. It is easier then changing your jets all the time. Sometimes when we go into our cabin it will be 10 or 20 above and overnight it can drop –20 or even –30 if the sky clears.
Snowmachining is not a thing to do - its a way of life