In the northeast many folks heat with oil. The oil sits in a 275 gallon tank and never empties - a perfect scenario for bacteria and water, yet it's rarely a problem. Heating oil and diesel is virtually the same product.
'93 F-250, - most original at 252K miles, rebuilt E4OD 220K miles
I have permanently parked my diesel. Does diesel fuel go bad after a long period of time. I know gas goes bad about 30 days. How about diesel?
If you can keep water out you'll be ok. Its the water that will allow algae growth that's going to be your biggest problem. I'd fill it all the way up to seeing fuel in the filler neck if it were me. This will keep it from having an air space in the tank where condensation can form.
Feb 03 6.0 Silver F-250 SD SC XLT long box, 6-spd 3.73ls, Fx4, Stock, Spray-in liner, Contico box.HARPOONED.
The ULSD supposedly has a shelf life of about 2 months. We let the bus sit all winter long without treating the diesel tank, and it grew a phenomenal amount of algae. It was so bad that it would plug a filter after only 10 or so miles. The stuff I drained out looked like green apple cider. Right now we've dropped the tank to steam clean it, and are putting new fuel lines on. If you're going to let it sit, put some kind of biocide in it.
'01 Dodge Ram 2500, Cummins HO, 4x4, 6 speed, homemade WVO system
'96 International/Bluebird school bus, DT466, homemade WVO system, www.thebiggreenbus.org
'04 Jetta TDI, Greasecar WVO conversion (chases the bus around the country)
'89 MCI 102A3, Detroit 8V92TA, Frybrid/Rover Hybrids custom system