Can copper be used for fuel line?

okay, im throwing in my 2cents worth. i install heating and a/c systems for a living. the newer systems use 410a freon which runds about 300-400psi when the system is running. the refer lines are soft copper. the equipment also shakes-vibrates a bit while running. ive seen very few that leak when installed properly. that being said, i am using 3/8 copper for my fuel lines on my car, but also putting 3/8 rubber fuel line over it anywhere it may rub against metal. i say go for it.