Would filling my tires with hellium give me better gas milage?

Yes. You'll float along just above the road. But your tires won't make contact with the road and you'll have no way to direct your vehicle.

Unless you retro-fit your vehicle with a huge rear fan and rutters (similar to that on an airboat).

Yes! Then you can skirt along with helium filled tires.

But you may spend what you save on gas on the huge fan and rutters.

But it would be great fun !!!

Take pictures.

no. that's a urban myth

you wanna save gas? look up hypermiling.

http://www.cleanmpg.com/forums/showthread.php?t=15...

i hypermile when gas is over $4/gallon (it's $4.50 now)

the boost in mpg ranges from 25% to 60%.

so that means if you drive a 30 mpg car the best i can do is 50 mpg...

And without FAS, since automatics don't like it when you shift into neutral then glide with engine off. actually almost all new cars will freak out if you did that, manual or automatic. my favorite mode of driving is forcing a DFCO. it's like a FAS but your car doesn't freak out.

but with FAS you cna see double mpg or greater. i think wayne gerdes set the record at some 170 mpg with a Prius? isn't that like 3 times with the EPA estimate?

No. Helium will leak out of your tires fairly fast -- And flat tires do not have good fuel mileage. (Helium is the smallest molecule so it leaks fast) . The weight savings is very small. And getting all the air out of your tires before you add any other gas is hard. (pulling a hard vacuum on your tires will pull the bead apart....)

roger (BSME)