The idea behind this simple drop in product, is that it creates a vortex of incoming air for better fuel efficiency.
www.myauto.tv (sales site)

Anybody tried this or have comments on the technical merits?

I wonder if altering a beer can would produce the same effect?

__________________
1979 300D 220 K miles
1995 C280 109 K miles
1992 Cadillac Eldorado Touring Coupe 57K miles SOLD
********************
1979 240D 140Kmiles (bought for parents) *SOLD.
SAN FRANCISCO/(*San Diego)
1989 300SE 148 K miles *SOLD

These things have been around almost as long as cars have. I've seen them in ads in my collection of old Popular Science mags going back to the 1940's, and my dad told me years ago that he's seen them since he started messing with cars in the 1930's.
Long story short, they were proven to be ineffective then, and more than likely are still. Buy a bottle of snake oil and put in your gas tank. It'll be cheaper, and probably more effective

__________________
past MB rides:
'68 220D
'68 220D(another one)
'67 230
'84 SD
Current rides:
'06 Lexus RX330
'93 Ford F-250
'96 Corvette
'99 Polaris 700 RMK sled
2011 Polaris Assault
'86 Yamaha TT350(good 'ol thumper)

The snake oil does at least the following. It increases your fuel economy by the equal amount of fuel that it displaces when it's poured into the tank.

Thanks for proving me correct!

Drinking a beer and inserting the bullet hole ridden empty
can inbetween air flow, will have the same effect and help economise $70 immediately.

Anybody want to go into business?

how 'bout a beer then?

__________________
1979 300D 220 K miles
1995 C280 109 K miles
1992 Cadillac Eldorado Touring Coupe 57K miles SOLD
********************
1979 240D 140Kmiles (bought for parents) *SOLD.
SAN FRANCISCO/(*San Diego)
1989 300SE 148 K miles *SOLD