The automobile industry has been finding ways to increase gas mileage.
-Choosing a more fuel efficient vehicle will help the fuel economy.
-Keeping your car in shape will help as well. Fixing up the car can improve its gas mileage by an average of 4 percent and fixing a major maintenance problem can improve your mileage up to 40 percent.
-Keeping tires inflated at the right pressure also improves gas mileage by 3.3 percent.
-Aggressive braking and accelerating can lower the gas mileage by 33 percent at highway speeds and by 5 percent around town.

There are some ways for drivers to increase their gas mileage:

1. Installing new spark plugs – can make your vehicle perform better.
2. Choosing your routes – avoid traffic lights if possible and shortest routes does not mean more fuel efficient if many traffic lights are around it.
3. Drive smoothly – sudden starts and stops hinder fuel economy.

Sources:

1. http://www.belmondnews.com/ara/automotive/a65572c0-a079-5df0-ac02-a29afd2915ca.txt
2. http://www.fueleconomy.gov/feg/drive.shtml
3. http://www.nytimes.com/2011/07/29/business/carmakers-back-strict-new-rules-for-gas-mileage.html?pagewanted=all&_r=0