No no!! You must use Power Master 15% or your engines will never run! I think I have tried every brand of fuel on the market and all of them seem to work very well. I buy the brand that is on sale. About the only thing I have stuck with is the 15% nitro but only because it works very well in every size of engine I use. Only reason I use PM most the time is I have always gotten it at a good price, when PM isn't on sale then I usually go to the Omega but I have to drive across town to get it.