So areyou sayingwhen you purchase fuel that is 10% nirto by volume it will produce the same power no matter what the oil content? Or since the nitro is not 10% of thefuelmix but 10% of the total does this really hold?
If I buy brand X fuel with 10% nitro and 20% oil with the remainder alcoholit is not the same blend of nirto and alcohol asbrand Y fuelwth10% nitro and 25% oil with the remainder alcohol. In the second case there is 5% actual less fuel and the higher oil content fuel should get poorer economy. (Which Ihave seen inGoodyear racing.) Of course all that misses that some synthetic oils do burn atthe temps model engines reach(which is one reason that they do less to cool an engine).
The easiest way around all this for someone wanting to run a Foxor other old style iron piston engineis to buy whatever fuel is available at the hobby shop and add enough castor oil to bring the total oil up to at least 25% of the mix. If it is a fuel where you cannot find the oil content listed anywhere assume it has only 18% and all synthetic oil. In that case I would add 16 oz of castor to a gallon of fuel and be pretty close. If I could I would stay away from fuels that do not already claim to be a castor blend.
I think we have beat this horse to death....
Bo