NO, that is a useless POS that does absolutely NOTHING for fuel economy, and might actually cause more HARM than good. First of all, that thing DOES NOT IONIZE the fuel, it magnetizes it, if that were even possible. It does JACK to the fuel, but any METAL contaminants in the fuel may build up into a gob in the fuel line where you have that thing clipped! Then when the fuel line is blocked from a clum of crap, it breaks loose, and goes up the fuel line as a big gob. THEN WHAT??? Now you have a gob of metal shavings, that may or may not plug something up, including fuel injectors, the fuel pressure regulator, or the fuel filter! Not good, a stupid idea if you ask me! It COULD theoretically cause damage to your fuel system, if that happened.

Now if you did happen to find a way to IONIZE the fuel, that DOES make for more power, and better fuel economy. Seen as how that involves sending high voltage through gasoline, that's a REALLY BAD IDEA!!! It can also create problems by attracting contaminants, destablizing the fuel, and possibly create ESD hazzards! If you want to waste money on a car part that's easy to install, and actually does something, get a K&N air filter, or cold air induction kit. It makes more power, and gives you slightly better fuel economy (because the engine can breathe). You could also invest in a capacitive discharge ignition system that does multiple sparks for every ignition. The crane fireball HI 6 is what I put on my 69 chevelle with a crane energizer spark coil. It has a rev limiter built in, and can be triggered by my MSD pro billet distributor. That will help fuel economy, and give more power too. A nice exhaust system is probably the best place to boost power and fuel economy though, I have a 2 1/2" flowmaster american thunder dual exhaust on my chevelle comming off a pair of headers. It has an H pipe with 3 chamber mufflers, makes that little 400+ HP 327 sound MEAN!!