I stand firmly by seafoam. I have added it religiously to all of my small engine fuel, both 2 and 4 stroke alike. Now, I have been running VP, and/or Truefuel in my 2 stroke stuff for the last 6 years, but my mower gets regular pump high test. I have never had the carb off of any of my stuff. My mower is a "PULLIN" Poulin Pro i bought in 2005, it still starts on the first pull. My toro snow blower was a curb find. I did have to pull the carb on that, but it was free. I sonic cleaned it and just ran the above fuel and still no problems after 8 years.