Thanks, Checotah, and thanks everyone for your thoughts.
Pappymac, that is just what I want to investigate now, knowing so little of industrial chemistry. That stuff I bought is indeed charcoal lighter fluid, could it be a different chemical from naphta, or would it be not refined enough for use in lighters? Ericusrex said he uses VM&P naphta, sold at Home Depot by the gallon. So how can I know if what I'm buying will be volatile enough, when not specified for use in lighters?