Bumper sticker to remind others to check their tire pressure for MPG

Hi folks, after reading that over 40% of vehicles on the road have underinflated tires that can rob a lot of fuel economy(link below), I had an idea for a bumper sticker designed to remind others to check their tire pressure. Please feel free to share your opinions or alternative suggestions.

Low Tire Pressure
Can Cost you 3 MPG
Check Yours Today!

A bumper sticker like this can help the environment immediately, because so many people forget to check tire pressure and don't know it affects fuel economy; and since they are already in their car driving, they are much more likely to take action right away. Any recommendations on the best place to create and order these in an easily removable vinyl?

Info link: Snapshot: effect of tire pressure on rolling resistance - MetroMPG.com