I used 10% ethanol mixture for the first time in Washington state when I went there to pick up my TT. Their fuel prices were 10 cents a gallon higher and my mpg was slightly lower. I don't think my pickup ran as well.
I am wondering if some of the slow fueling problems are caused by the EPA regulations. Some of the stations, not in Montana or Wyoming, have those sealing gaskets when you fuel. I think CA is the worst. The pump won't run unless it is totally sealed off with the gasket.
2012 Jay Flight 19RD TT
W/thermal package: R19 walls, R22 roof, R24 floor
2008 F-250 Ford FX4 6.8L V10/4.10 rear axle
Curt class V hitch
Reese trunion WD with dual cam
AC6CV/7 ex-W8RUR since 1954