As Chris said, (overbored), Byrons is a good reputable and reliable fuel. We, just about all of us here in our club anyway, use 15% nitro and most fuels come standard with a 20% lubricant mix.. often turbine oil and castor oil mix. What is more important here is not the nitro mix but the lubricant mix. A good reliable mix is 20% and should not be less than that. More than that can also cause some problem with to much lubricant and poor ignition. So, that combination is a good one.

Hey, there are people here on RCU that talk about using no nitro in their methanol / lube mixture and they are flying just fine. There are a lot of factors involved here, but if your Byrons 15% nitro and 20% lube works ok, then stick with it.

DS.