Fuel Mileage booster’s

mpgmike said

If you want to better understand what some of the effective modifications are, there is a site that lists about 20 or so and how they work.

www.MPGenie.com

Click to expand...

I have been feeling that the device may have given the ecm a rich condition in order to make it drive the fuel delivery lean. Silly idea since the ecm runs things about as well as possible. Emissions rules in the ecm programming doesn't give up much fuel efficiency.