When it’s 32 degrees out, this chart tells you approximately how long your oil will last, based on an averaged size house and average usage.
| Tank 275 gallons | Remaining oil | Days w/o oil hot water | Days w/ oil hot water |
| 1/2 | 125.0 | 18.9 | 18.4 |
| 3/8 | 93.8 | 14.2 | 13.8 |
| 1/4 | 62.5 | 9.5 | 9.2 |
| 1/8 | 31.3 | 4.7 | 4.6 |