Guess what modification I made today & win a prize!
 

OK, I decided to play a guessing game.

Today I did a modifacation to my Metro. I doubt very seriously that it will help my mileage too much though. However if the car behind me is drafting they may see benefits just from my little Metro being in front of them. You never know, stranger things have happened.

I will ONLY reveal this modification with the blessing of Matt as it may be a trade secret and then we all go to jail, I don't want that to happen. So we'll have to see if he approves of this mod, if not I fully understand.

My name is Matt Timion, and I approve of this message :)

Is it a partial boattail?

Nope, smaller & lighter.

rear diffuser under the gas tank and bumper?

Nope, still even lighter and smaller.

Guesses:
partial boattail
rear diffuser

Clues:
Small
Light
possibly no mileage gain for me (maybe) but could net huge gains for who ever is following close enough

Is it a gassavers.org bumper sticker?

Crap that was my guess!!!!!

some sort of electronic display showing your instantaneous MPG readout to folks riding your bumper?