I will attempt to get a refund as that company does offer a "lifetime warranty" but I won't be surprised if I can't. The chip only cost me about $68.00 so I won't go bankrupt. I have heard from a few here locally that a chip worked for them, but also heard some got the same results as me. I used to get a bit over 15mpg but then some rough idling, smoke, etc so I changed out the injectors but now average 13.47 mpg. I was hoping the chip would put me back to a bit over 15mpg.