Back to the Bio diesel. Unless a #2 diesel pump has more than 5% biodiesel in it, it does NOT have to be reported or displayed. So, pretty much any diesel you buy has biodiesel of at least 5%. I have a huge Cummins engine in my motorhome and most all diesel available on the west coast is 20$ bio. I don't see any significant change in mileage or performance. My 40 diesel motorhome averages 6.6 mpg and we live in California, so it's pricey to fuel.
Those on here who have diesel trucks and drive quite a bit, should look at the Open Roads discount fuel card. It's a brokerage company that offers a card good at most large diesel stations like Loves, Petro, TA , and many others. The discount varies between stations and states. At a TA in Yuma, I got $1.06 a gallon off of the price. Most savings are .25 -.50 cents a gallon.