In Virginia, federal rules that kick in when pollution is a problem in urban areas have meant that part of the state must use oxygenated gasoline, while the more rural remainder does not need to. Of course, the oxygenate is now 10% ethanol, where it had been MTBE before the revelations about that chemical polluting water tables.
The gasoline-ethanol blend is required in the Richmond-Petersburg area and north, and in the Hampton Roads (Norfolk/Hampton/Virginia Beach) area including the city of Suffolk. I live in Southampton county, the next jurisdiction west, where the blend is not required. But over the last six months or so I have noticed the "10% ethanol" stickers on more and more pumps here and in neighboring rural counties.
Some stations don't have the stickers but I suspect that most are running the blend. For example, one Sunoco station near Courtland has the stickers, while the Sunoco station in Courtland, three miles from the other one, does not. I can't believe one Sunoco would have gasohol and the other so close would not.
And my '98 Taurus really dislikes gasohol. My mileage drops 2 mpg with it, and the car definitely does not run as smoothly.
To be assured of getting straight gasoline without ethanol, I must go into North Carolina (Roanoke Rapids/Northampton county area)—but even there I'm beginning to see the ethanol stickers on many pumps. When I can fill up at a "safe" pump there, my mileage immediately returns to the old, higher level. However, it generally isn't worth going 20 miles out of the way to get straight gasoline. Catch-22.