From NPR:
Oil company Exxon-Mobil released their first quarter earnings report Thursday, showing steep profits amid soaring costs. With gas prices hovering around $4-a-gallon, we ask our listeners for their money-saving tips. (link) Then we do some fact-checking with Jon Linkov, managing editor of autos at Consumer Reports. Filling up in the morning will only help you save one tenth of one percent, he says, so focus on more significant gas-savers, like the following:
1.) Check your tire pressure once a week.
2.) Keep your car well-maintained.
3.) Don’t carry extra weight in the trunk.
4.) If you are in really bad bumper-to-bumper traffic, turn the car off.
5.) Once you really break 55 mph, you are hurting your fuel economy, so try to slow down.