your crazy but i like where your heads at:driving:

toluene is added to gasolines (especially race fuel) from the refinery, It was first phased out by MMT which does the same thing but is a waste product of plastic production so it's dirt cheap for the refineries as they would just dispose of it otherwise. Then the EPA being the way it is and MMT making ground water under a spill zone taste like crap, ethanol has been getting phased in as the new octane enhancer/oxigenator, even though it costs significantly more. Government subsidies have been put in place to make the ethanol affordable for the gas companies. My guess is most people don't know about toluene (also called toluol at the sherwin williams) or that it can be purchased locally for next to nothing. I went into the sherwin williams asked for toluene and he said "we only carry un-recycled automotive grade so it will cost more" $35 dollars later i walked out with 5 gallons which is enough to treat 95 gallons of 93 octane fuel and achieve 110 octane. I wish i could get my hands on some propylene oxide but the EPA began regulating it as it is known to the state of california to cause cancer :rolleyes: what isn't? also if you spill propylene oxide on yourself you better get rinsing as it is a skin absorbed poison.

Why is anyone running race gas? You must have massive engine mods to require higher octane (to avoide spark retard which prevents knock)...

Higher octane fuel provides NO benefit to a stock engine. Octane only increases the knock limit of an engine, and our engines are designed for 92 octane.

my car definatly behaves better when i have some 100 in the tank.. no doubt about it

psychological effect. Octane is a chemical added which makes the fuel harder to burn. This prevents pre-combustion, or knock, which can help engines that are either old and have carbon build up which causes hot spots, or modified high comression engines (pressure+temperature causes ignition), or engines that run extremely hot due to very high power output. Your brand new stock engine will not knock on premium fuel, unless it's 140F outside, therefore your engine will not advance the spark, which will not reduce the power output. Fact. Ask an engine engineer. Oh yeah, I am one. That's your answer.

I agree with maybe blending the two to get the mid 90 octane range. I also live in CA and think its absolute BS that all we have is 91. You quite possibly could have cleaned up your injectors and everything else with the 100 octane. Kind of like a Seafoam type cleansing.

No offense but you don't need extensive engine modification to run race gas on our cars. The engine is already an 11 to 1 compression ratio, and the factory ignition tune is fairly tame, most advances to the timing curve benefit greatly from having a higher grade of octane. A $500 tuner is all you need to justify race gas. when the car gets hot it may be pulling timing on the factory tune some of the track guys have noted a loss of power at temps and while it could be caused purely by the raised temps, the timing has been suspect. more data-logging needs to be done to confirm it of course but the added fix of running higher octane fuels when near limp mode temps are being reached is cheap insurance. Also you never know what race gas he was running as many now contain performance enhancing oxygenators that are pour in power. I agree race gas is not going to provide much if any gain when driving around town but don't bash it's use right off the bat. If i manage to get my hands on some propylene oxide it will be good for a solid 2% gain in power in a 5% mixture ratio.

Also Octane is not the chemical added to increase the knock resistance of the engine it is usually MMT, toluene, ethanol, MTBE