I run pre-mixed gas in my trimmer and chainsaw. I had bought a Poulan trimmer about 10 years ago and probably ran it enough to count on both hands. I redid the carb twice before giving up and buying another one. After assembly I tried to start it and put my thumb right through the primer bulb. Thoroughly disgusted, I went directly to the local dealer and bought the cheapest Stihl they had. Using only pre-mixed gas, it fires right up and works flawlessly...been 3 years now. IMO, for the average homeowner, the price of pre-mixed gas is worth not having the issues.