To run out of heating oil on the first day of snow this 'winter' (yes, I know it's spring now).
Thank goodness for wood buring stoves. :-)
Apparently we have oil out for delvery today, so if it comes this morning then I'll bleed the pipeline when I get home and we'll have heating again tonight. I just want the tank to have enough time to settle first, so we don't end up drawing water and particulates into the burner, even though there's a couple of inline filters.