Maybe you've never taken notice, but a family that is comfortable arguing is a DYSFUNCTIONAL FAMILY. You might not think that's serious right now, but in time, you will understand. Reminder---GASOLINE FUMES ARE EXPLOSIVE. If anybody in the house smokes or uses a stove, GET OUT before you blow up (keep a fire extinguisher handy to use on your dog). Why does your dog like gasoline on their coat? Does your dog have MANGE, fleas, ticks?
Diatomaceous earth is also used with colonix (safe) and has been used in deworming also and can also be used against bed bugs and roaches, slugs, etc.. There are different grades (food grade, pool grade, etc.) of diatomaceous earth (very important not to get the wrong one, lung hazard), but I can't think of a GOOD reason that a dog should like gasoline. Tell your family to stop being careless with gasoline.