Re: injector cleaner.
I use Xylene. Its already in high octane gasoline at the pumps, its also the major component of many injector cleaners that you pour into your tank. Its completely sensor safe. In the drag racing circles people mix it up to 30% in the tank to raise octane (its 114 or so). You can get into the high 90's with a mix.<br /><br />I only use it for cleaning injectors and such. I buy it at Sherwin Williams supply stores (its a paint thinner, also the solvent used in commercial caulking), you can buy a gallon jug for about $10. Pour it in with a tank of gas. I usually buy the 5 gallon drum to save money. I pour in 1-2 gallons for a full tank of gas.<br /><br />Your exhaust will smell quite interesting and you will then realize you can smell it if you buy premium gas at the pumps, only weaker.<br /><br />I do agree that you should probably change your fuel filter later regardless of the cleaner. You will notice the effects after half a tank is used up.<br /><br />I have also run some through my boat. It also fixed a near useless weed whacker after my carb rebuild did nothing to help it at all.