I am trying to figure out if I am burning an unusually high amount of heating oil during the summer months. I had my 250 gallon tank filled in mid April and it ran out of oil today (10/12). 41 gallons a month seems like a lot of oil for heating water during the Spring, Summer and Fall. It is just my wife and I... show more I am trying to figure out if I am burning an unusually high amount of heating oil during the summer months. I had my 250 gallon tank filled in mid April and it ran out of oil today (10/12). 41 gallons a month seems like a lot of oil for heating water during the Spring, Summer and Fall. It is just my wife and I living in the house and we take average length showers once a day. Please let me know if my consumption is too high.