[rmay635703]

I believe there is merit to fuel heaters especially in the cold tundra up here. Only about 30% of a tank of gasoline is actually gasoline, the rest is additives and heavier compounds (boy the crap gas we have) As such although most of the fuel burns to some extent only maybe half burns completely and clean the rest has to finish burning once it exits in the cat. If you have ever taken a CAT off a car you will know it, smells like raw gas out the tailpipe.

Originally Posted by SVOboy

Before you go throwing money at magnets, I would suggest giving this a read: Fuel saving gadgets - a professional engineer's view

Or go to harbor freight and buy one when they are on clearance for $2-$5. If you get tired of the thing it works well as fridge magnet and has a cool looking lable on it. Speaking of which you could just put a cow magnet, fridge magnet or whatever on there if it makes you happy.

There have been a couple sucessfull (as tested by the EPA) fuel magnet/dissimilar metal jobbers like the vitalizer. (Before flaming read the papers on the thing, it did very slightly improve FE but not enough to cover its cost)

The fuel economy improvement was a whopping 1% meaning you better not spend very much on a magnet.