I'm in. It is cool (9oC) and cloudy and windy here, and has been for days. House is 18oC right now. Just me radiating heat, plus cooking and showers, keeps the house warm enough. Plus I have warm slippers and appropriate clothing, I am not dressed as if it were summer inside. Daytime highs are projected to be below 10oC and nights are going down to 0oC over the next two weeks, so we will see how things go.
Last winter the oil company kept doing fill-ups when I had 1/4 to 1/2 tank of oil, so I definitely use less than they project. And this is with me home all day, I used even less when I worked and only heated the house for an hour in the morning and maybe 3 hours at night.
The dog is no help, she is much too well insulated to let any heat out. She would like me to keep the house at 4oC (or less). At night she is on the bed - no added heat, but I am well insulated on the side she sleeps on.
Side project - I have decided to post temperatures only in Celsius, so that non-metric users can adjust to metric, and metric users don't have to keep figuring out Fahrenheit temperatures. MMM forums, always a learning experience ;-)