OER Parts offers a wide selection of Oil Cap for your 1973 Plymouth Road Runner. OER Parts offers 1973 Plymouth Road Runner Chrome Oil Caps, 1973 Plymouth Road Runner Deluxe Twist-On Oil Filler Cap, 1973 Plymouth Road Runner Chrome Twist-On Oil Caps, 1973 Plymouth Road Runner Chrome Push-in Oil Caps, 1973 Plymouth Road Runner Billet Oil Caps, 1973 Plymouth Road Runner Polished Aluminum Oil Caps, and 1973 Plymouth Road Runner Logo Oil Caps.