A friend and I are compiling a list of non-bio fuel stops. Here are a few to make note of if running I-80 across the midwest.
Sapp Bros, York, NE, I-80 ex. 353
Sapp Bros, Odessa, NE, I-80 ex. 263
Shoemaker's, Lincoln, NE, I-80 ex. 395
Dows Junction, Dows, IA, I-35 ex. 159
These might have some pumps that are bio in the summer, but each have pumps that are non-bio year round.
Dave