M-zone fuel saver magnets

Anyone fitted the M-zone fuel saver magnets that I keep seeing on ebay?

With current fuel prices upping my mpg would be great!

Would be great if they worked.
Obviously they don't.

There are many many many many threads
on these scam devices if you try a thread
search.

I agree, complete rubbish! If they really worked all car manufacturers would mount them as standard. Actually, I think there would even be a law forcing them to. By the way, there is nothing magnetic in petrol or diesel.

Another vote against them from me!

Pure snake oil!

I've tested them in the past (not this brand but they're all the same sort of junk)!

Absolutely no difference to power, emissions or consumption whatsoever! Always worth remembering that the last thing the fuel flows through on pretty much all injected petrol cars is...

...a pretty strong magnet - the injector!

For my sins, I do actualy have a degree (admitedly 2:2) in chemistry, so I think my opinion may be valid.

Octane is a boring 8 Carbon straight chain, with only hydrogens attched to it. Essentially it has no particular charge centres, and the electron cloud can be thought of as evenly, randomly dispersed, i.e. there are no particular +ve bits or -VE bits. For a magnet to have an effect, it would only do anything on a net local/overall charge.

If my A level physics holds up, a charged particle passing through a mag field of this nature, would tend to spiral/cork screw anyway, so hardly becoming a nice linear arrangement.

Even if it did have an effect, say on some of the chemical additives which may have slight +ve and -ve local charge centres, the instant the fluid has passed out of the field of the magnet, entropy takes effect and would restore the fluid to a highly disordered system, which is more energetically stable.

You can get most molecules to respond to mag fields, in fact there is an entire branch of chemistry involved with it called Nuclear Magnetic Resonance. It is used to identify molecules from resonances to applied mag fields, which give off fingerprint traces. However the mag fields have to be huge, 10-20T (Can stop analogue watch hands and pace makers at 5 metres), and typically at liquid helium temperatures. Not to mention big, a small NMR machine is ford transit sized.

These fuel line mounted magnets are neither powerful nor cold, especially in an engine bay. The magnetic field in the alternator or starter is probably going to give more effect!!

To sum up, if it has any effect at all, the instant the fluid has passed the mag field, any effect would disappear.

Originally Posted by earlyriser

You can get most molecules to respond to mag fields, in fact there is an entire branch of chemistry involved with it called Nuclear Magnetic Resonance. It is used to identify molecules from resonances to applied mag fields, which give off fingerprint traces. However the mag fields have to be huge, 10-20T (Can stop analogue watch hands and pace makers at 5 metres), and typically at liquid helium temperatures. Not to mention big, a small NMR machine is ford transit sized.

Uhh..... this argument is put forward by the magnet
schiesters but it is false.

NMR is about looking at magnetic spin on an atomic level.
There is (to my understanding) no effect on the molecular
level. Imagine the damage it would do to the human body
if there was!


These "products" are totally bogus and have been proved so
time and time again. The only positive feedback you'll find on
the web is half truths and outright disinformation. End of story.

I've got a gallon of snake oil for sale will give you 100mpg only £250

I bought one for my Mondeo and it's taken the MPG from 26 to 185, I'm more than happy with my purchase!

Originally Posted by Darren156

I bought one for my Mondeo and it's taken the MPG from 26 to 185, I'm more than happy with my purchase!

Surly you can't say you're happy with the purchase of the mondeo - give me the magnests any day - they go faster

:tongue:

Ah, the Mondeo Chris was NEVER a purchase, it's just always been about, Please do not confuse me with fellow Mondeo Men who actually buy their Mondeo's,

Originally Posted by Darren156

Ah, the Mondeo Chris was NEVER a purchase, it's just always been about, Please do not confuse me with fellow Mondeo Men who actually buy their Mondeo's,

Originally Posted by Darren156

Ah, the Mondeo Chris was NEVER a purchase, it's just always been about,

You mean you just robbed it?

What amazes me is that, after being proved to be totally useless, companies can still get away with advertising (and selling, presumably) these 'products'. There's no justice is there?

I once read somewhere that in WW2, the RAF used to coat the fuel tanks of Spitfire's with some form of magnetic coating to improve performance - it must have worked as we won the war


Update - I found the article, it was Hurricanes. An RAF engineer called Henry Broquet developed a fuel catalyst to help the Hurricanes cope with the low grade Russian fuel - no idea if this stuff works though,
Link here BROQUET Fuel Catalyst home page

Link for review on this sort of stuff CHOICE - Fuel and oil additives

Magnetic coats inside a fuel tank could actually make some sense though, any magnetic particles (rust) that could block fuel filters and such would be trapped inside the tank. Better mpg? No way....

Originally Posted by Chill

I once read somewhere that in WW2, the RAF used to coat the fuel tanks of Spitfire's with some form of magnetic coating to improve performance - it must have worked as we won the war


Update - I found the article, it was Hurricanes. An RAF engineer called Henry Broquet developed a fuel catalyst to help the Hurricanes cope with the low grade Russian fuel - no idea if this stuff works though,
Link here BROQUET Fuel Catalyst home page

Link for review on this sort of stuff CHOICE - Fuel and oil additives

I thought there was a lawsuit against these a few years back as they didn't work? Unless they actually dissolve in the fuel there is no chance.

Sadly as fuel prices rise so will sales of this rubbish.

I have a device that is gauranteed to work. I sell them for £5 each + postage.

Its called a house brick and you jam it under the accelerator pedal.

You could get a similar effect by making the accelerator cable longer, or the pedal travel shorter.

ah but I bet they work on diesel........

Originally Posted by CrispDust

ah but I bet they work on diesel........

Ah diesel - the fuel of the gods

Originally Posted by earlyriser

To sum up, if it has any effect at all, the instant the fluid has passed the mag field, any effect would disappear.

I've been told that by a good chemist at a university too. that it IS possible to "polarise" octane "a bit" with a powerful magnetic field but that as soon as the molecules leave the field, they revert pretty much instantly to the way they were.

Also, The same guy did some tests on some of those "tin pellets" that one is supposed to put in the tank. He weighed them to 3 decimal places of a gramme, left them in the fuel tank for a year, removed them and weighed them again. Absolutely no dfference whatsoever!

I remember one of the classic cars mags did a test on the tin pellet type, as they claimed to allow the use of unleaded fuel in leaded only vehicles. I think it was an MGB that they did the test on.
After 3000 miles the cylinder head was damaged beyond repair.

Other magazines refused to carry adverts for them.

These things do work, honestly.


...buy 10 and wedge them under the throttle pedal.

Some people do see an improvement in mpg though. Nothing to do with chemistry or physics - social engineering. Having spent some cash on such a device, people will be more conscious of mpg and some will subconsciously drive more eco