I have ran a few different fuels and which one I will run more has more to do with what I can get the easiest from the local shop(s) with out having to drive all over the place. I do like the Gen2 as it is better than the first gen by about 30 to 45 seconds on a tank for me with lower temps. The Sidewinder fuel has worked well for me too, seems that many of the plane and heli. guys like their air fuel more than Byrons. Yet there are many who like the Byron's for their planes and heli's. Preferance I guess. Losi's fuel is right there too and I think the newer Blue Thunder is better then some of the early stuff. If you are willing to drive for the Gen2, then do so. I am sure you will like it. If not than just about any of the other top fuel co.'s out there should be close to as good. At the current price of gas and the fuel to play with I try to get what I can close to me.