Top Off An attempt to dispense gasoline to a motor vehicle fuel tank after the dispensing nozzle’s primary automatic shutoff mechanism has engaged. See also PEI/RP300. By rhys|2014-10-23T14:10:04+00:00October 23rd, 2014|Comments Off on Top Off Share This Story, Choose Your Platform! FacebookTwitterRedditLinkedInWhatsAppTumblrPinterestVkXingEmail About the Author: rhys