Has anyone ever tried the hydrodynamic magnets device which supposedly increases the gas mileage by up to 25%?

Question

Do they work?

Answer 1

I've not tried it simply for one reason.There are many supposed breakthrough devices on the market that claim to drastically improve gas mileage. So far the only ones that are making the claims are the companies selling them or the guy who created it. When something really worth the money comes out it will be major news. Magazines like Popular Mechanics, Popular Science, and the news media will be telling everyone about it. Until then save your money.

Answer 2

I've heard of magnetic devices that are supposed to help align molecules so they react better.  Gasoline and air molecules are not affected much by an ordinary magnet, and even then, they will only be affected while they are in the field.  When they leave the field, they will no longer be affected.  

I'm a chemist and I never heard that even having your entire combustion chamber inside the magnetic field would have any noticeable effect on the combustion reactions.

Answer 3

They do not work.  Several groups have experimented with them, and the reputable ones (like Popular Mechanics) found that they are useless.

For an article explaining them, see this:

http://www.fuelsaving.info/magnets.htm

This guy's website ( http://www.fuelsaving.info/index.htm ) has a lot of great info on the various fuel-saving doo-dads out there, and tells you why they don't work, and can't work.  Just remember that your car is controlled by a computer these days, and that computer can extract up to 97% efficiency out of fuel (compared to about 80% thirty years ago).  Unless you can somehow program your own computer to make the car greater than 100% efficient (impossible), then it's a waste of your money.