House size, stove size, stove efficiency, multiple stoves, old leaky house, poor attic insulation, no/minimal oil backup use, heat preference, etc.

For me: 5-6 cords, large EPA stove, 175 year old house with shit insulation, tend to only use oil in fall and spring and prefer to prevent it from kicking in over night/early morning and while away during the day so I basically always have the living room stove burning. On sub zero stretches I have an old non epa stove with an air blower in the basement that really pumps out heat. Can go lower than 5 cords if I burn more oil and can go more than 6 if I burn no oil.