Woman adding Green Fuel Tabs and filling her tankI have been using Green Fuel Tabs in both my SUV and my mid size sedan for about a year. My SUV has gotten an 18% mileage improvement, and definitely feels a power improvement, especially since it is a bit older and now runs a lot smoother. My mid-size car gets about 19% to 20% better mileage, and it also just passed its smog test with a breeze this year since its emissions have dropped off to almost nothing.    L.L. - Anaheim, CA