I lurk a lot here but never post. I heard something this weekend that I have never heard before and wonder if there is anything to it. I figured surely you guys would know. I bought a new, Stihl blower. I also have a Stihl string trimmer and chainsaw, all, of course, two cycle engines. I have always used regular, 87 octane unleaded gasoline for my mixture. Which brings me to my question. The guy at the store says Stihl recommends using premium, preferably 93 octane fuel in the mixture. I have never heard of that. Is there anything to it?