Here is a version from Mother Earth News.
You don't even got to get this fancy if you don't want to.
I have burned it in a wood boiler just by getting a good fire going, putting in an old 12" cast iron skillet (make sure it is well bedded in about to the grates, level and solid, and then putting something smaller inside that to hold the oil. Just about anything works, even an old oil filter setting with the opening pointing up. I usually used a cast iron pot that held about a quart. Fill what ever it is about 1/2 to 3/4 full and just sit it in the skillet. Put a ember in to light it.
The skillet gets very hot and acts as the preheater and burner for any oil that foams over out of the container. The oil does tend to bubble and foam a bit, will burn on the surface of the container but some spills over and burns in the skillet. The skillet acts as the safety backup device to catch any oil and has plenty of volume, sort of along the idea of spill rings / sumps around oil storage tanks. I never had any odor or plume problems with this method.
I've used this method just to get rid of used motor oil. Used to have recycling centers but they have closed. Tough to find any legal way to dispose of it. People who sell oil are supposed to have to take the used back in the same container, but most give a hassle.
You can burn off 6 - 8 quarts in a short period with the above method. Can give you a lot of heat, want to start with small volumes until you get the hang of it. Can even refill on the fly. Need a long necked metal funnel. Can make one with a piece of pipe and tin can.