RE: Improving Fuel Enonomy
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"The Eco-System is installed inline on your vehicle's fuel line after the fuel filter. When the fuel passes through the unit it creates a catalytic reaction, breaking up the hydro carbon chains in the fuel, causing the vapor pressure to increase. "http://www.ecofuelsystems.comBULL!!!works the same as a half-dozen other snake oil products out there.Popular mechanics tested some of these systems on a dyno recently. None improved power. None improved fuel efficiency. One of them caught fire on the dyno. Some of them reduced fuel efficiency by as much as 20%.If you spend the money and put one of these on your car and want to believe it works, it likely will... you will drive differently and there will be a "placebo effect"http://www.popularmechanics.com/automotive/auto_technology/1802932.html It's crap i tell you.And believe me, if this offered even 1 mpg improvement, manufacturers would be all over it. One reason: CAFEAs an engineer i can tell you that this would get nowhere near my car.And there really isn't any funny business when it comes to gasoline formulations and EPA tests. It's a standard test, running a standard fuel. If a different fuel improved economy and emissions, believe me the states (commiefornia esp.) would mandate it in a hurry.
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I usually agree with you Dave, but I can't on this one.
After installing the Fitch Fuel Catalyst on my car, I gained 2 mpg, and it has stayed there for about two years. I can understand a possible placebo effect and adjusting one's driving habits for a short period of time...but not two years. I am an aggressive driver who floors the pedal all the time. I wouldn't change my habits to improve my mileage, prove anyone wrong, or any other reason.
Further proof...I installed the Fitch on my wife's H2, and though she knew I did it, she didn't know what it was for. She went from 9 mpg to 11 mpg in about a week. There obviously couldn't have been a placebo effect here since she doesn't know a fuel filter from a coffee filter, so it MUST work. I've done nothing else to the Hummer besides install the Fitch.
The reason I even tried the Fitch in the first place is for two reasons: I really wanted to improve on the 9 mpg, and I figured with the 30 day-no-questions-asked-money-back-gaurantee, all I'd lose is the time I spent installing it, which was about 30 minutes.
Improving the H2's mileage by 20% has already saved me the $300 it cost for the system. My Mark's mileage only improved by about %10, so I'm guessing that its effects will vary by engine. I'm guessing that our 4.6 DOHC engines are more efficient than the 6.0 Vortech in the H2.