Hi, I was slabbing a large oak with my 3120xp and it was a windless day and I was sucking alot of fumes and wondered if there were a better way. I was on the Forestry Forum and they stated that a product called Opti-2 was way superior to most two cyle oil as far as the fumes it puts out. My question is since it is used at 100:1 does anyone have any thoughts as to wheather it might hurt the saw. I typicallty run at 40:1 with other oils, thanks for any input, Bart