Numbers Game

On a blue Honda Fit: MATHGRL

Musical

On a silver Cadillac CTS: TNR SAX

Flower Fixer

On a green Honda Pilot: PLNTDOC

Computer function

On a black Ford Fusion: ALT F4

Proud local

On a gray Mercury Sable: BUY MI

Cross-country

On a black Ford Fusion: NOVILAX

It's a job

On a black GMC Sierra: WAITER

Flying High

On a red Saturn Vu: SOARNUT

Brag

On a black Mazda RX8: IBFUNNY

Witty Geek

On a silver VW Jetta: HTTP418 (translation: "I'm a teapot")

Brand Loyal

On a black BMW X5: B M DUB

Carpet Cleaner

A banged-up white RAM 3500 says RUG NUT

Snack

On a beige Cadillac DeVille: POPTART

Religious

On a black Ford Freestyle: PSALM46

Jimmy Fan

On a gray Mercedes E350: HOFBOS5

Living Large

On a beige Mercedes C230: B1GG1

Graceful

On a dark red Pontiac Vibe: GAZELLE

Binary

On a black BMW X6: 1010101

Go Big

On a silver Honda Odyssey: LIVE2XL

Naughty

On a silver Mercedes CL63: SPANKED

Romantic

On a black Solstice convertible: ONEHART

Optimist

On a red Ford Expedition: GOHAPPY

Honest to a Fault

On a blue Mitsubishi Lancer: LAZY