Remember in the US the Octane rating will be less then those abroad! Our 87 is there 92 exc.What type of fuel grade are you guys running in your large scale r/c's? Unleaded, Super Unleaded, Preimum?
I was reluctant to try it, but now I wont go back. I had heard it makes it harder to start in the cold, but I ran it at 30 degrees (as cold as it gets around here) with no problems. I swear it runs better.