Everytime there`s a dime to be made, The scammers come out of the woodwork. I`m talking about claims to increase your gas mileage. I`ve seen it all, pills for your gas tank,magnets etc. Any time you start hooking diodes to your vehicles sensors it`s going to turn on the check engine light. And common sense would tell you if you run water through your engine your gas mileage will decrease as the ecm richens the fuel mixture. So save your hard earned money. Don`t buy this junk. I`m an auto. tech. with over 30 years exp. and if any of these sellers can prove to my satisfaction that i`m wrong, i