"Can you say "54 miles per gallon?" I know I can."

A couple suggestions:
Steer away from the "slow" stereotypes. As more hybrids come out, the generalization isn't true anymore.
Stay short and sweet! Most are too long for some products.

Visit my newly-acquired website, Volconvo Debate Forums!

"You spend more on coffee than I spend on Gas!"

"Can I help you with that $70 fillup? Mine was just $28"

"No Plug. 54 MPG. 700 miles per tank. Any questions?"

Sorry if these have been posted already, I didn't read all of the other posts.

1) Hybrids do it better.

2) Hy Brid, good to see you.

3) Gas prices suck, you don't have to.

4) Feel the electricty!

5) Chicks dig high mpg.

6) My dog wants you to buy less gas. Get a hybrid.

Gas + Electric = Hybrid

Billy

How about:

"Got guzzler?"
"Respect my 50 MPG."
"Fear my gas mileage."
"You may be faster, but I'm smarter."
"Hybrid. No wires attached."
"Hybrids. Because Earth is important"

Great idea for a contest!

Here are my entries:

Hybrid = high hopes for the future
Hy(brid) hopes for the future
Honk if you get 40+ mpg!
That thing got a hybrid?
Ahh... The sweet smell of clean air
The real EPA!
Environmental Protection Agent
You'll thank me later

How about these: Some are stupid, but one might be a winner. Hope I haven't plagerized anyone's.....

"Hybrids, not as scary as YOURS! "

"HYBRIDS run on chicken feed"

"Hybrids, the future is NOW!"

"HYBRIDS, THEY'RE A GASaver!"

"Hybrids, not just for smart people anymore"

"Dr. Jekyl, Mr. Hybrid"

"Hybrids, less gas, more go!"

"Hybrids, half the gas, twice the fun!"

"HYBRID$AVE"

"HYBRIDS, MORE MILES & SMILES"

"DOUBLE GREENHYBRID"

"HYBRIDS, $$ in the bank, not the tank!"

"HYBRID SPELLS VALUE"

"HYBRIDS, SERENITY NOW!"

More to come.......

Kansas, not as flat as you think...