The Fitch changes your fuel before it gets "sprayed"...It changes the molecular structure from a daisy chain like molecule to an aliphatic molecule (with "fingers" so it's a cleaner more efficient burn. You'll get more horsepower and better fuel mileage. It was invented to be a fuel stabilizer for the government. The navy uses it in their vehicles that sit...saves the fuel from becoming bad and you don't have to put Stabil in it ever again. I have a Fitch in all of my vehicles including my snow blower, lawn mower, cycle, car, snowmobile. It's worked in everyone of them. I personally know mechanics and 'regular joes' that have tried it and loved the performance. So, say what you like....they work- and it's not just me saying it...
Fitch Fuel Catalyst: Products - Published Reviews