Saving money on gas through fuel efficiency continues to be a major area of public and policy interest for several reasons:
- Passenger vehicles account for approximately 40 percent of all US oil consumption;
- Increasing energy efficiency helps reduce our dependence on imported oil and enhances the nation's energy security;
- Fuel efficiency helps conserve our fossil resources for future generations;
- Passenger vehicles contribute about 20 percent of all US carbon dioxide emissions, so increasing fuel efficiency helps reduce greenhouse gas emissions;
- Finally, the more miles a car gets per gallon of gasoline, the more money the owner saves on fuel costs.
Given the importance of fuel economy, the federal government administers programs to provide information to consumers about fuel economy and to encourage the production of fuel efficient vehicles.