My car began leaking gas only while running. I'm suspecting the return line just above the tank. The problem I got is that it is friggin cold outside and no shop has time to do it. But anyway the question I have is what is the best (easy) way to drain the gas from the tank. Its almost full. The book recommends siphoning, but will it be easyer to maybe take the filter off and run the pump until dry, or connect a hose to the schrader valve?