I am running B-20 most of the time. Prices are close to #2, sometimes a few cents higher, but with the tax refund you can get for running Biodiesel it makes it cheaper. I think you get 50 cents a gallon back in a tax refund. I don't know if that means you get 50 cents a gallon for B-20 or only 10 cents because you are only running 20%. Either way I am saving up my receipts for when I file my taxes.