Oil Burning Stove - Waste Vehicle Oil Stove - WaterHeater - Outside Oil Fueled Furnace Answered

I am looking for a decent incarnation of a oil burning stove/furnace/heater.

My issue is this....when I load up my woodstove for the day, my house is cold when I return 9hrs later.

I recall my father had a gravity fed waste oil stove/heater in his mechanics garage.

he did not have to go feed it like his coal/woodstove.

Thanks!