If you are using a kerosene heater, the U.S. Consumer Product Safety Commission and the National Kerosene Heater Association advise you to follow these suggestions in order to minimize the risk of fire and potential health effects from indoor air pollution.
CAUTION: Improper fuel may cause pollution and sooting of the burner. Use only water clear No. 1-K Kerosene.
DANGER: Risk of explosion. Never use gasoline in this heater.
CAUTION: Risk of indoor air pollution. Use this heater only in a well ventilated area. See operating instructions for details.