It's your $100. Give one a try. Maybe you'll be the first guy here smart enough to try the new hotness... If it were my money, I'd be extremely skeptical of any site that has tons of glowing reviews hosted only on their own site. I'd also be skeptical of any device that just plugs into the obdii port, because it doesn't work that way.There are numerous chips online for sale. Most have a money back guarantee. Numerous reviews saying how their mpgs went up. Typical prices are around $100.00.