Whether you keep the temp of the house at 70 or 65 will also affect your usage. Zonal heating, this can be added by your serviceman, and preset thermostats help a lot. Oil in the Rhode Island area now goes for about $2.49 pg for non contract suppliers to $3.09pg for contractual suppliers. Last year, with the price of a barrel of oil down to $35, these figures were from $1.89-$2.59. The year before with oil at $150 pb the cost was $3.69-$4.39pg.