When I used kero for my Aladdin lamps, the local bulk retailer would be out pretty often, so I used to go to the airstrip (closer than the town) and fill a 5-gallon can with Jet A, helicopter fuel. It was cheaper and worked fine. There might be additives, but I didn't burn enough to have any ill effects (and the old log cabin I lived in was well-ventilated: I could feel the wind between the gaps in the chinking).
