I don’t know if this story is credible or not but has some background:
http://siarchives.si.edu/blog/tractorcade
I remember them helping out with the blizzard. That was a good thing. I was at WVU majoring in ag business. They laid over and gave a program where they lit diesel in a dish an lit ethanol in a dish to show how clean and efficient it was
They were asking for parity. Amazed it is all coming back now. College in the 70’s. Well.....