How do I cypher gas from a car?

I think you mean " syphon " not cypher. To syphon you need a small diameter plastic tube , 5 feet is long enough, put the pipe into the fuel tank, into the fuel,.suck gently and fuel will come up the pipe.Careful not to swallow any !, As the fuel starts to flow put the end into a container, keeping the pipe as low as you can,