Using cruise control on the highway helps you maintain a constant speed and, in most cases, will save gas.

Using less gas leads to less CO2 emissions which, in turn, produces less global warming in the atmosphere.

With proper tire inflation, you can improve your gas mileage by over 3%.

Highway vehicles account for 27% of all US CO2 emissions (1.7 billion tons each year).

Ten percent of all vehicles cause 90% of the mobile-source pollution.

Gas mileage usually decreases rapidly at speeds above 60 MPH. For every 5 MPH you drive over 60 you are paying 21 cents per gallon more for your gas.

About 17 percent of the vehicles on the road have gas caps that are either damaged, loose or are missing altogether, causing 147 million gallons of gas to vaporize every year.

Idling for longer than 30 seconds uses more gas than starting up your engine.

Each gallon of gasoline you burn creates 20 pounds of CO2.

With proper tire inflation, you can improve your gas mileage by over 3%.

Using the manufacturer's recommended grade of engine oil can improve your gas mileage by 1-2percent.

Idling gets 0 miles per gallon. Cars with larger engines typically waste more gas at idle than do cars with smaller engines.

Limit aggressive driving. Speeding, quick acceleration and excessive braking all lower your gas mileage.