This might just be me, but ive ran a couple setups like this in my 05 st and to no avail, my friend purchased one and was afraid to put it in his mustang, i tried it and did"what its suppose to" which is make the gas, but that raps it up. i did some quick elementary math. i was eating more money on gas using the alternator 2 power the electricity 2 use it than i was getting back with the gas. but the way, the more it works, the more amps you pull from the battery, the more u use the gas your producing. tried it with a home made one i did a yr after and the same results. (tested with volt meeter on alternator battery and hho device)