Hondo - go and read the original Ecomodder and Metro MPG sites (there are links here) and look at the testing. Look on YouTube where people have made quite a few A-B-A tests - including a Metro testing a number of mods such as tyres, cruise vs DWL, even (god forbid) acetone - if I can find them I'll post a link.
Its not clear what you are proposing but it looks like running a few tanks with the mod off and then a few with it on. Sorry mate, not going to slice the mustard I'm afraid. If you can get tanks which are so consistent you can see an immediate change then you live in a place with no traffic variations, no seasons, no weather, no wind and in fact the perfect place. And you manage to drive so consistently that you never have a bad tank vs a good one.
Just look at the fuel logs here - even the masters of MPG don't manage that.
I'll stick my money where my keyboard is - you do it first including videos and photos of you methods and results as I described above. If you do it as described and it shows a difference
I hereby promise I will repeat the test and report back - and I'll even pay for my own magnets and you can nominate the brand / type to use (subject to a little financial limits - I have a wife to placate and I won't be paying "your" company $3K for the experience (joke - honest...)
).
So how about it ?
If you win I'll buy you an Ecomodder T-shirt - can't get more tempting than that.
