ORIGINAL: tsperry88
''I wonder if OS or Hobby Services wants to go on record that Cool Power should not be used in OS motors. Or to ignore the fuel manufacturers recommendations? Perhaps Chris. S would like to comment on this.''
The AX manual says you need 18% oil. Cool Power has 17%. My guess is that Hobby services would tell you to ignore the fuel manufacturers recommendations since the fuel does not meet the minimum requirements that are printed in the engine manual.
I have used Morgan fuels in OS engines and will continue to do so. But, it is my choice and my risk.