Dear Green Fuel Tabs, Consider this my endorsement of your product. I began using the Green Fuel Tabs about 2 months ago in my personal vehicle, a 6 speed manual transmission 2006 Z51 Corvette. Despite being my daily drive vehicle this Corvette has some bolt-on performance parts and makes about 500 HP.
Fuel mileage is pretty good for a performance car of this type. I tend to drive with a pretty heavy foot, which yields about 14.5 mpg with a combination of 50% City and 50% freeway driving. The Corvette is efficient on the freeway and gets 25 to 27 mpg on long trips but around town...
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I 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. - 
I have a 2005 
