Fair, it's kind of a gamble whether propane or oil will be cheaper. We bulk bought propane in the $2.80/gal range ( prepaid for 800 gal and they deliver throughout the season) which I know is not an option for a lot of people due to eating an upfront cost. But since we locked in with our propane supplier for a year they waved the tank rental fees. It ended up working out for us. I think my mother ended up paying around the same total amount for 2 oil fill-ups $4 /gal * 2* 300 gal tank.