I haven't ran mine since spring/early summer, not to much work this yr and what I did have was either big wood or tiny invasives. I'd buy another in a min if I needed one, great saws, husky hasn't made a saw in that size for a long time so they left the market open, to bad stihl isn't making them now either .I dunno how many hours but it's lots and many gallons Lol
I mix about 20 gallons per year , not all goes through the 241 but the bulk of it does .
I use quite a bit of mix, I run a lot thru my backpack blower all yr, it works great for blowing the snow of the walks/drive and cars. I'm ready for that BTW, but it is nice right now and I'm getting a lot done, but the rain is on it's way today.