Originally Posted by memphis.landscape
All the small engine places here recommend 89 so that is what we use.
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The book(s) call for 89 octane fuel in my Stihl, Husqvarna & Kawasaki handhelds, so that is what I use. Everyone has an opinion, but the folks that make the equipment should know what is required. I only use the mid-grade (89 octane) Sinclair (no ethanol) gasoline and Stihl HP Ultra synthetic oil. All the equipment runs excellent with very few problems, and none related to gas or oil.