Home heating oil must be kept in fuel tanks from which your oil burner draws its fuel. The tanks come in different shapes and capacities to fit your basement or yard space and meet your heating needs. A couple of shapes and a variety of capacities are standardized, though variances exist. Common sizes for residential installations range from capacity of 275 gallons to 1,000 gallons.

...

Oval Tanks

...

Oval oil tanks can be set vertically or horizontally. A typical 275-gallon oval oil tank is 27 inches wide, 44 inches high and 60 inches long if set vertically. If set horizontally, it is 44 inches wide, 27 inches high and 60 inches long. The oval 330-gallon oil tank has the same width and height as the 275-gallon tank, but is 72 inches long.

Cylindrical Tanks

...

Other standard home heating oil tanks are horizontal cylinders. A 300-gallon oil tank is 38 inches in diameter and 60 inches long. A 500-gallon tank is 48 inches in diameter and 65 inches long. A 550-gallon tank is also 48 inches in diameter, but is 72 inches long. A 1,000-gallon cylindrical tank is still 48 inches in diameter, but is 130 inches long.