Thanks gfp, you posting on the possibility of an oil disruption weeks ago, has had me filling up our truck at the pump and leaving the 500 gallons or so in the tank out back, in case of an insane spike again, (diesel at 5 dollars + a gallon like last time.)
Nice thing about diesel in that is stores easily for a year or more and there are additives widely aval. to bring back old deisel quickly by just pumping it out through the nozzel and back into the tank to mix it in....