The gasoline used should be high quality and contain high octane count (anything from 92 and up is acceptable). It will do OK with the 10% fuels, but it will NOT live very long running 15% or higher.......Just some food for thought... Ethanol gas is okay if you follow the rules: I made the switch just recently too, from running 87 octane regular 10% Etoh, to running 90 octane Etoh free. Pros It is a lightweight gas saw that is effortless to use. i feel your pain! can i run 100LL (low lead) aviation fuel in my chainsaw without problems? I've heard of people using it but mixed 1/2 w/ 87 oct. strait up will burn your saw up for sure. Mixed with Husqvarna’s synthetic oil blend. I run whatever the cheap stuff is. All thanks to this tiny ad: Permaculture Community Garden fundraising effort - You can Win Stuff!!! Add gas stabilizer if the gas is going to be in there for more than a month. I run 87 octane corn liquor "enriched" gas in everything. My tractor that has a snowblower on it seems to collect a fair amount of moisture in the fuel and end up freezing in the float bowl of carb. For a limited time, you can extend your Husqvarna gas handheld, like chainsaws, trimmers, and leaf blowers, for up to 4 years by purchasing Husqvarna premixed fuel along with your handheld purchase. I think regular is just fine as long as it is good pure regular. A good quality unleaded fuel is needed. We now have the starting information now to create the two-stroke elixir that will start, run, and protect your chainsaw from wear and tear. I've not had any problems with my saws, but occasionally I DO get some of that AvGas and after a retune on the saw, what a HUGE difference in power.....honestly, it makes that big of a difference. In doing so it transforms gas into a propellant witch burns slower than the speed of sound. But if you purchase the better 91 or 93 Octane gas then surely it won’t seem that expensive. I would use premium in all my 2-stroke engines regardless, as gas octane drops pretty fast with age, and octane also drops after adding premix oil to it. Many people think high octane means hotter or more powerful and that isn't quite true. For easier and more dependable engine starts. I spend the extra to get premium non-ethanol marine gas (only gas in Oregon that you can get w/o ethanol). The stale gas can clog the carburetor during operation. Something else to keep in mind, OPE was NEVER MEANT to be run with ethanol gas in it. trufuel or similar ethanol free would be my next choice. Husqvarna 50:1 Pre-Mix Fuel, 584309701 at Tractor Supply Co. We offer the best pre-mixed fuel option for the your handheld equipment. cost me one blown chainsaw and over a $1000 spent to mechanics to get my other equipment running again! Varnish deposits are formed if you keep it for too long. When I bought my 026PRO the techs at the dealer insisted on using regular as high test could make the saw run hot. . no chainsaws, mowers, weed eaters, snoblowers, etc. . I talked to the station owner and he told me they did it to stay competative with their prices. The chainsaw is an ideal option for heavy-duty ranch applications. you will be replacing rotten fuel lines, and rebuilding plugged carbs. current server time (not your local time) is, List of Bryant RedHawk's Epic Soil Series Threads, STIHL MotoMix® is a high-grade, high-octane, ethanol-free premixed fuel containing STIHL HP Ultra synthetic oil. who has ethanol free gas in ravenna? The Husqvarna 135 is built for homeowners who need a lightweight & efficient tool for use around the yd. I have all older saws, most of them were rebuilt and customized by me.