Just to clear up Dave's posting above, he means to run the engine with one quart of kerosene, and the rest of the pan full of oil. I was always taught to just idle up to temp, as the oil is so thin. Like about everything, everyone has their own procedures, and I'll bet all of them are right!
Now, the manual I had for my '49 Poncho, said to just change the oil, and run half detergent, and half plain oil, then do full detergent.
For what it's worth, the detergent oil won't take the place of pulling the pan, and cleaning out the sediment, it won't magically clean it all out at once. At least that's my experience.
