Everyone's got an opinion on this, but think about it -- If it were as easy as installing some "chip", then why hasn't Ford, GM, Chrysler, Toyota, Nissan, Honda, Mercedes, Volkwagen, Hyundai, with their thousands of engineers and billions of dollars worth of testing and R&D facilities already done this?
You'd have to believe some mail-order company, working out of a rented industrial unit somewhere, has managed to uncover some unknown secret that the big manufacturers -- with all their technical resources -- have been unable able to come up with.
If it were real and didn't have a down-side, then surely Ford would have bought them out and given themselves a huge competitive advantage.
I see advertisements for those chips, too. I also see ads for pills that'll make my ding-a-ling bigger, and pills that grow hair on a billiard ball. I doubt any of those products will do what they claim, other than relieving the excess pressure on your wallet.