The fuel is the same for both, Powermaster 20/20. I dont know where I got the idea that the ys 63 would have more power than the Saito 72. I guess I just wanted to believe it caus I have 3 63s. I will try the APC and see what I get. I have plenty of power with my setup now to do everything I want. It just dont come off the bottom of a knife edge loop like I thought it should. I might get some 30% Heli mix just to give it a try. Thanks.