My oil fired boiler is 30+ years old, it still works but probably needs some work, and with the cost of fuel oil being close to 4 bucks a gallon, I was considering replacing it with a propane fired boiler. Those are the only choices that I have. Some contractors have told me to avoid propane at all costs, something about the BTUs per gallon as compared to fuel oil. Others have said that with the efficiency of todays propane boilers, it is probably a wash. Me, I haven't a clue. Would like to hear some professional opinions. I have a simple ranch house with baseboard heat from the boiler, two zones.