There are just way too many factors. Consumption rates of 1-2 Gallons per hour, when the furnace is on are within the norm, but it is hard to say how long the furnace has to stay on. In the US North East right now (late Feb 2015) I cannot imagine it will last you more than 2 days. But you will have to adjust to your own conditions, of course.
1. Heating Oil Storage. Heating oil can be stored in your tank for up to two years without problems. In fact, it can last for 10 years if stored in ideal conditions. Heating oil is more stable compared to gasoline and other kinds of fuel, meaning it doesn’t break down easily.
The term “diesel” is used in NFPA 110 “1.5 to 2 years of storage life.” According to the Standard, “Tanks should be sized so that gasoline is utilized within the storage life of the tank, or provisions should be provided to replace stale fuel with fresh fuel.” A-5-9, NFPA 110. How long does it take for red diesel stay in tank?Long winded indication of how much def to expect. DEF usage will be somewhere around 1.5 - 2% of fuel usage. 100 gallons of fuel used will take about 1.5 - 2 gallons of def. If you want to accurately determine DEF usage, the method needs to be the same as hand-calculating fuel consumption. Fill the tank. Record the odometer reading.
An underground storage tank (UST) system is a tank (or a combination of tanks) and connected underground piping having at least 10 percent of their combined volume underground. The tank system includes the tank, underground connected piping, underground ancillary equipment, and any containment system. The federal UST regulations apply only to
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