I heated my house with oil for 40 years. Towards the end of my oil burners time, our heating bills would go up every delivery. So our season's oil bill would run from between $1900- $2400 , depending on how cold the winter was and the price per gallon. 2 years ago the boiler gave it up and needed to be replaced. We shopped around for prices and there was a big difference between the 5 estimates we got. So we picked one and had a new Gas boiler installed. it cost less then 10k soup to nuts. Our heat bills dropped big time. We now keep the house thermostat set higher then we did with oil, and last seasons heating bill was $700. I would never go back to oil, or replace a broke oil furnace with another oil furnace.,,,