I have been using 50:1 in my fuel for 10 years and I find no problems with my Stihl and my recently Tanaka. I still got my Stihl FS44 for 10 years and I service it regularly. The mowers I do up didn't hurt either particularly The Power Torques 2 Strokes. My Main Current Mower, A Victa Mustang Mulch & Catch 5HP 4 Stroke Tecumseh runs on Normal Unleaded. I tried the E10 But I wouldn't recommended it because it had the hiccups and I put her on the 98 Premium Unleaded and she's running like a dream on it. No foul ups either. My Stihl & the Tanaka runs also like a dream on the 98 Premium Unleaded Fuel and I had no Foul ups either. Thanks.
Regards.
David.
