The outdated rubber cover on the nozzle is/was designed to keep gas fumes from escaping into the environment. (Please, no comments about EPA or California laws, etc.)
Try holding the rubber cover up when gassing up. Or, you can try to find a station that no longer uses them, and there are more and more of them in CA.
[B]BichonLover is a 100% California gal, driving a vintage Fleetwood in SoCal.