Are you on automatic delivery? The oil company I use calculates the "degree" days (cold weather) and then delivers without my having to do anything. I am on a plan where I pay a predetermined amount a month from Sept to May and it includes service calls, and an annual cleaning. We also sign a paper to pay a set amt per gallon for the season. This year it is $1.09 a gallon. The annual cost to me for heat & hot water & the service contract is about $900. And I don't play with the thermostat. If I am chilly, it gets turned up a bit.
I also got a new furnace this year after 32 yrs, so I am interested in seeing if the costs will go down. Less to the oil co, means more to Disney. It all just passes through my wallet!