Yes, I figure I'll come out on the short end of this deal. Runs on this gallon doesn't run on that one, same brand same label, pretty obvious it's a fuel problem. I just wish I had realized it sooner. I just had this engine rebuilt 6 months and $200 ago, it's just a shame it was running so well and I was so happy with it. I don't really expect the fuel manufacturer to do much, some guy calls him and says "hey your fuel ruined my engine" what's he gonna do, say "OK I'll buy you a new one right away!!" yeah right. Unfortunately I may be SOL, and they have lost a customer for life, like it matters to them... Hopefully Richard can save it.... again. I will be dropping it off at the shop this week, I pass right by there on my way to Bishop and Mammoth for work.