Caught myself wondering if now that gas doesn't have lead in it...is there really that much difference? Word up in days past was that the coleman fuel was just white gas, in that it didn't have lead, and the lead would screw up yer generator. Then they took off with "duel fuel" units, lanterns, stoves etc....just wondered if it wasn't kind of a moot point that we hadn't figured out; and the only difference was the label on the appliance. Caught myself wondering if using some premium gas in the older lantern and sportsman stove, might be just fine. Anyone tried or know?