The new Campaign Earth challenge is in. This month is about proper tire inflation. You can increase your mileage by 2 MPG just by having tires filled to their proper inflation level. Also you can increase the life of your tires by 50% and keep them out of the landfill. Easy stuff! Get a tire gauge and check your tires today. Have them checked at every oil change and add air whenever necessary. Go to http://www.campaignearth.org/ to sign up.