Drivers Seek Mileage Boost From Hydrogen, Oxygen BubblesBy TIM KNAUSS Steve Kushnir's 'Hydrogen Hurricane' is an equipment package he sells that uses a car's electricity to make hydrogen and improve the way the engine burns gas. (Photo By Frank Ordonez) [Liverpool, NY] -- Stephen Kushnir's 7-year-old Chevrolet Prizm used to get 35 miles per gallon on the highway. Not bad, but Kushnir thought he could do better. A month ago Kushnir, a middle school technology teacher in Liverpool, N.Y., popped the hood and installed a gas-saving gizmo he had purchased over the Internet. He got it from...