Running on Empty

Since gas prices have risen this spring, some drivers are buying a little gas at a time instead of filling up their tanks. That means they may drive with the tank close to empty. This raises a question we've checked out once before: When your gas gauge reads empty, is it? Does empty really mean empty? Last fall, I ran a test. I bought a spare can of gasoline and set out on a road trip -- a trip that started with next to no gas in my minivan's tank. When I left New York City, the car's gas...Full Story