First of all, red diesel here is straight #2 with nothing but the dye added to it in the winter. It's NOT winter diesel, pump diesel has everything already added to make it winter diesel. I buy it, and add NOTHING to it, and have NEVER had even one problem with gelling no matter how cold it gets.
Secondly, NO ONE where I live knocks 45 cents off red diesel, even though they say it's "untaxed". They generally stay about 22 cents lower than pump price, so yes, they are screwing the customer.
It's worth it to me to buy pump diesel in the winter and look for the best price. It's $5.089 right now, that's not much more than you paid for red!
SR