I'm not sure if this belongs in this exact place .. but ... I was in the local Canadian Tire and saw Octane boosters that cost a bunch of dollars. Upon looking through the Web I saw that Toluene ( http://en.wikipedia.org/wiki/Toluene (http://en.wikipedia.org/wiki/Toluene) ) is much cheaper than octane boosters and does a better job ... I found a link about octane numbers ( http://en.wikipedia.org/wiki/Octane_number (http://en.wikipedia.org/wiki/Octane_number) ) and interestingly ethanol ( http://en.wikipedia.org/wiki/Ethanol (http://en.wikipedia.org/wiki/Ethanol) )is used to boost octane ... ... Also - some forums talk about using Laquer Thinner as it contains Toluene, Methyl Alcahol, and Methyl Ethyl Ketone ... any thoughts or experience out there ???

We just normaly use STP or a good brand of booster but when it goes away for the winter he uses stabil (pardon the spelling )