The Energy Information Administration collects weekly heating oil and propane prices during the heating season which extends from October through March.
This will translate into total winter season heating cost increases of approximately $300-$700 depending on the size of the house and the fuel being used.
The weekly report is seen here: http://www.eia.gov/petroleum/heatingoilpropane/
That is why Mor Electric Heating is so busy, people are calling to convert to electric heat which can lower you bills dramatically because of zoning rooms. See http://www.heatersplus.com/comfort.html for some options.