Below is a rough estimate on my heating cost over the past 5 years. I got my stove installed on 2009. We average about 100 gallons of oil per delivery. I have a 200 gallon oil tank. My wood buying, I split the cost and work with neighbors.
Heating Oil No Wood Stove
2008 - 10 deliveries - 1000 gallons year - $2,805 - $2.80 gallon
Heating Oil w/ Wood Stove
2009 - 5 deliveries - 500 gallons year - $1,255 -$2.51 gallon
2010 - 5 deliveries - 500 gallons year - $1,343 -$2.68 gallon
2011 - 5 deliveries - 500 gallons year - $1,737 -$3.47 gallon
2012 - 5 deliveries - 500 gallons year - $2,048 -$4.09 gallon
2013 - 5 deliveries - 500 gallons year - $2,010 - $4.02 gallon
My total Cost for heating oil 5 years: $8,393
Projected potential oil use without stove over 5 years: $16,770
Wood Buying
2009 - 2 delivery split - 4 cords - $950 - $237 cord
2010 - 1 delivery Grapple - 8 cords - $900 - $112 cord - split with neighbors
2011 - 1 delivery Grapple - 10 cords - $900 - $90 cord - split with neighbors
2012 - 1 delivery split - 3 cords - $750 - $250 cord
2013 - 2 deliveries Grapple - 16 cords - $1800 - $112 cord - split with neighbors
My total Cost for wood buying 5 years: $3,500
My total Grapple Cost: $1,800 - 17 cords
My total Split Cost: $1,700 - 7 cords
Heating Oil No Wood Stove
2008 - 10 deliveries - 1000 gallons year - $2,805 - $2.80 gallon
Heating Oil w/ Wood Stove
2009 - 5 deliveries - 500 gallons year - $1,255 -$2.51 gallon
2010 - 5 deliveries - 500 gallons year - $1,343 -$2.68 gallon
2011 - 5 deliveries - 500 gallons year - $1,737 -$3.47 gallon
2012 - 5 deliveries - 500 gallons year - $2,048 -$4.09 gallon
2013 - 5 deliveries - 500 gallons year - $2,010 - $4.02 gallon
My total Cost for heating oil 5 years: $8,393
Projected potential oil use without stove over 5 years: $16,770
Wood Buying
2009 - 2 delivery split - 4 cords - $950 - $237 cord
2010 - 1 delivery Grapple - 8 cords - $900 - $112 cord - split with neighbors
2011 - 1 delivery Grapple - 10 cords - $900 - $90 cord - split with neighbors
2012 - 1 delivery split - 3 cords - $750 - $250 cord
2013 - 2 deliveries Grapple - 16 cords - $1800 - $112 cord - split with neighbors
My total Cost for wood buying 5 years: $3,500
My total Grapple Cost: $1,800 - 17 cords
My total Split Cost: $1,700 - 7 cords

) so I had to look it up online. EIA says "NY" is around $4.25. I live in western NY between Buffalo and Rochester, so I'm not sure how representative that "NY" number is for me, or if it's influenced by downstate. Pretty sure I'd be around $4.