I learned about fuel through many sources, but when I saw that SWAMI site, it was a blessing, because he <like he said> made a long boring story about fuel "short". And it has just the right amount of info to understand it.
That being said, our Polini Evo's are "a high compression cylinder" as the swami stated may be an argument for super-unleaded. I, as I stated, have found 93 octane to be sufficient all though 94 or 95 would be nice insurance if you can find it from a pump.
I am running the 25:1 that tiba suggested and yes, it produces smoke, but I get a good feeling knowing that all that much more oil is in there lubricating. As mentioned, the extra oil does lean the mixture, and what I am wondering from tiba is, if he believes that the extra oil replaces some of the mix that would have been gas, therefore reducing the "cooling effect" of gas on the piston and cylinder?:!