I've often wondered if the oil will settle out of the gas while in the chainsaw. In light of the problem that stihlboy is having right now, it makes me think that perhaps the oil settled out of the gas. And if it did, is it hard to get remixed in this cold weather? I may pour a quart jar of mixed gas and put it in the freezer just to find out. If it does settle, and if the chainsaw is kept in a place that gets cold, I tend to think that it may be very difficult to remix after it has set for several days. If it does settle out and if it is difficult to remix in cold temps, then perhaps draining these big saws after every use in cold weather might not be a bad idea. Robb