Do those magnetic fuel line gadgets actually work (i.e save fuel)?

Please don't just give your opinion (unless you are a scientist). I would like an answer from someone who has tested one.

Thanks

Answers:
I have boughten one off Ebay for a couple of bux.I figured i'd give it a shot(it was cheap).I tried it out for a couple of days.I didnt seem to see any difference.Alot of people manufacture this little tiny clip on for your fuel line.All it is ,is 2 magnets that clip aroung your fuel inlet line.Some people that make it claim that they fit any vehicle!Thats BS!The one i bought was suppose to be a "universal" fit.It was too small and i had to put a wire strap around it.I would've been better off using the 8 dollars i spent on the item and used it for gas money.Save your money,they dont work.
No, they are a total SCAM, according to the US EPA. They test "gas saving" devices and post the results on their website. Have a look for yourself.
Yes.
No. Those are gimmicks. The purity of fuel is often very good, along with your standard fuel filter you should have zero purities. That fuel is refined over and over at high temps. Its doubtful it is that dirty. Dont buy into any of those items, air swirlers, magents, etc. The auto makers spend millions to make realiable vehicles. The refiners have strict standards for their fuel. There is no magic out there.
It seemed like I consumed MORE fuel using one of those gadgets.
How can a the flow of fuel, (controlled by the accelerator) be reduced by passing it through a magnetic field?
My dad tried one a few years ago, all that happened was he spent an afternoon tinkering with his car.
I asked him if he noticed any results a few weeks later, he said none whatsoever. (after approximately 2500 miles)
You would probably be better off making sure you have the correct tyre pressures and a nicely tuned and serviced engine for better fuel economy.
NO. And turbulators in your intake won't work. Pyramids won't sharpen razor blades either. Avoid snake-oil products!
I have not tested one personally but did watch a program
on TV recently where several of these devices were
tested and all came up negative. I think the demo was
broadcast on SpeedTV channel, even though there
was a program on that same channel that advertised
them. I would venture a guess that Consumer Reports
may have done testing and perhaps can be accessed
via internet. Hope that helps you.
They probably work about as well as the magnetic shoe liners that reduce back and neck pain, don,t fall for this load of B.S. Oh and I have never tested one but have seen every conceivable gimmick to try and increase fuel mileage over the years and none of them quite seem to work as well as advertised I,m sorry (but not surprised) to say.
No. I bought one years ago and the magnets are on my fridge now. Only get it if you want a $20 fridge magnet. ( or I'll sell you one for $10.)
The EPA has tested several of them. None of them worked. Here is where you can get their word on it, in PDF format:

http://www.epa.gov/otaq/consumer/devices.
http://www.epa.gov/otaq/consumer/devices.
http://www.epa.gov/otaq/consumer/devices.
http://www.epa.gov/otaq/consumer/devices.

CNN and Popular Mechanics recently tested a more powerful one and found the magnets were so strong they screwed up the engine's computer, reducing gas mileage.

http://www.cnn.com/2006/tech/science/08/.

That result is pretty rare. Usually the magnets do absolutely nothing rather than reducing gas mileage. The "science" they base their claims on is complete baloney - gasoline molecules do not align in a magnetic field, they would not stay aligned once they left the magnet, and even if they did stay aligned there is no reason to think that would make them burn more efficiently.
not at all, complete scam the US EPA has tested them and proven them to be a scam
http://autorepair.about.com/cs/generalin.
Link to research on fuel saver claims.
NO, if I could have made NO bigger I would have!
If this worked manufacturers would build magnets into the fuel line(or magnetize them before putting them on)
tried one some years ago, absolutely no fuel saving to be had, save your money for another couple of gallons

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