Originally Posted by TomJ

Diesel ain't what diesel used to be. Not only considering the ULSD issue, but the gradual lowering of cetane rating as has been pointed out. The easy cure is blending your own biodiesel into your blend, accomplishing substatially higher lubricity (B2 is 30% higher lubricity than the older normal sulphur added diesel) and higher cetane (B100 has a cetane rating of 10-15 points higher than normal pump diesel.)

So, you can make your own additive that has two benefits (more than, but at least the two above), and reduce the overall cost of your fuel bill at the same time.

A person could even mix WVO with their #2 if very well filtered and not too migh a concentration to cause gelling and probably get the same effects as bio-d. If using #1 in very high concentration for your winterizing, I would HIGHLY recommend cutting with WVO or bio-d.