^^ That map paints a prettier picture than reality, at least for the Commonwealth of VA. It's because fuel distributors and suppliers are being pressured to sell ONLY the RFG blends.
There are only a handful of E0 stations in all of Virginia, and I suspect it's much the same elsewhere in the country. Here's a thread on the topic:
http://www.virginiagasprices.com/For...age_no=1&FAV=N