Well, I've lived in NH, CT, NY, PA, DC, MD, VA, and driven north to Maine, south to Florida and west as far as Wyoming, but I don't ever recall seeing 85 for sale.

Very interesting. It is amazing the things I sometimes learn after writing these essays. My assumption for years has been that most of the country has N85 as the lowest grade. I have traveled around the country a lot, but mostly before I was involved in gasoline blending. But that's a major benefit in doing these essays - learning new information.