Originally Posted by
juniorsr1
So, this is my first post and am VERY new to the HHO thing. I have a 2000 f250 4x4 with 5.4L engine. It hangs right in there at about 10-11 mpg and is my daily driver. That said, I've been toying with the idea of installing an HHO system on it. I'm looking for some advice as to if it is conceivable to think that I could break into the midteens on mileage and also what sort of system to start out with. Also, will this mess with my OBDII and turn on my "check engine" light? Thanks for any help in advance.