Walter:
Yup, I too like their fuel and will go ahead and trust their stated measurements as volumes.
Right now, I am bench running for break-in a new/old stock OS Max 35 S. The 10% nitro Byron fuel with the oil blend boosted to 24% seems to do the job with a 9x4 APC prop for break-in. So far, it's got one hour running time with another hour to go. I tried a higher oil ratio (approx. 28%), and the motor didn't seem to like it.
The LHS guy stocking the Byron fuel says that he will only stock the 15% nitro juice from here on out. Not sure what (if anything) that'll mean for these older motors. I've been using 5% and 10% from their line.
But as they say, it's all good!
Thanks.
Dave...