I know you don't like the thought of a new heating system and the associated cost, however how old is your boiler? If it's more than 30 years old it is doing you no favors at all. You already know the price of fuel and have probably projected this years bill. Doubt you were happy with your estimates, none of us are. Steam is a horribly inefficient way to heat. Before you get any heat at all the boiler must heat the water to 212. It takes a lot of energy to heat water to 212. Far more than heating it to 180. The boiler AFUE efficiency is also probably down in the 75% or less range also. New boilers are in the mid 80% range. If you are heating with oil I'll bet that oil tank is 30 years old and getting ready to start leaking also. It's a big initail cost but changing the system out to forced hot water will save you probably near 1/2 your current oil bill annually. Especially if you put in a very high efficiency unit with modulating reset controls. I've been in the heating business for 30 years now and believe me that old steam system will give no nothing but problems once the piping starts to go.