gnegroni wrote:Don't they use toluene to increase the octane grade of fuel?
You are correct, but toluene content is brought into an acceptable level for regular non-commercial combustion engines (i.e. Solaras, Civics, Cobalts, Fusions, etc.). There are different chemical cracking processes whereby toluene is generated. For the most part the gasoline manufacturers do not differentiate between what process their toluene comes from and they just blend any and all of them into their gasoline to tweak octane
during manufacture. But nevertheless, there is alot of stoichiometry (balance of ingredients amounts) involved that must be maintained.
Post adding too much toluene to your gasoline will destroy this balance. To what extent, I couldn't say but I have seen evidence of people trying to make their own "homebrew blend" of racing fuel only to have the detergent additives settle out of the base gasoline before they even introduce it to their gas tank. I've also seen what happens after they introduce it--did you know it is possible for a header to eject through a hood without actually breaking the hood hinges.
I'm not a fan of octane boosters that you buy off the store shelves. Buying these little bottles of "boost" is equivalent of using guaze as a condom in my opinion. You have to imagine that if they slapped on a tag line of "safe for all gasoline engines" there can't possibly be enough balls to the stuff to make a bit of difference to your engine. They are not in a market to get sued so I think they lean towards "watering" down their product rather than giving it more "oomph". And as far as injector cleaners and deicers go, I put my trust into the additives packages BP, Shell, etc. already have in their gasolines. I have no input for water removers.