With U.S. gas prices hitting $4.00 a gallon and oil hitting a new high of $120 per barrel, everyone wants to save gas. The hypermiling movement claims you can double your gas mileage by doing things like pumping up your tires to the maximum rating, using lower viscosity oil, and pretending you’re Lance Armstrong and drafting behind other cars on the highway. One guy says he gets 71 mpg from his Honda Insight by “pulsing and gliding” — accelerating then turning the engine off and coasting until he hits 15 mph, when he turns the engine back on and accelerates again. Other good methods include leaving the car in the driveway, walking, and siphoning gas from the neighbor’s car.