All of the above. When I had a kerosene wall space heater (externally vented), I used to mix it in and burn it. Worked fine. This was the carburetor type. A gallon or two in 55 gallons was no big deal. But all the above will take it. I always save the jug and take it back in the same jug. I also have a 5 gal jug that if I am doing a trans change out, I will use that.