we've always run 65 daytime in winter here in pa and 60 at night. but i do that because i'm cheap. with new windows and doors i use less than 300 gallons of oil a winter for a 3 bed/2 bath house. if i go to someones house who has the heat set to 70 i feel like i am in a sauna.
Same deal here, but run it at 63 all the time.
