This is the only 2 cycle I use in my equipment. I used to use John Deere Premium FC rated synthetic blend and it would fill up the spark arrestor in no time. 93 octane and Stihl ultra HP. I am also fussy with the brand of fuel I use, Marathon or Sunoco are all I will fill my 2 cycle tanks with. I may use Hess or Citgo sometimes for my mowers but it is not an emergency for me to wait and get the right fuel for my handheld gear. Haven't had a plugged spark arrestor since before Mothers day.