I can not find a real answer on this. Will home heating oil go bad? I am doing a job at an old convenient store and there is a full barrel of oil in the basement that needs to be removed. The unit no longer uses uses oil for heat and hasn't in a long time. I don't know how long it has been sitting there but judging by the pile of crap on top of the old boiler I would guess about 10 years. I am having a co. come in to take the tank out but figured if I 1 get a bunch of free oil for my house and 2 cut down the cost of the removal (sense its considered hazardous waste) that would be good. I do have doubts on whether it would be good though.