How much you'd pay per winter really is dependent on the market and if you lock into a contract/price, which I never do. I order oil as we need it. On average from the past three years, I use about 350 gallons of oil for the winter. The heat stays between 60 and 66. My last fill of the winter/spring generally lasts 6-7 months. I don't know the square footage of my apartment, but it is a 2 bedroom, 5 room 1st floor apartment in a two family home. The furnace doesn't appear to be too old, but I'm not an expert on those things and I believe it's steam/hot water heat - we have radiators.

The biggest contributing factor to our home heating oil use is that it is also our source for hot water - so we try to keep the hot water use to a minimum and any/all leaky faucets get fixed immediately.