Did you guys catch the bit in the PDF regarding the fuel separation in the tank and in the tanks at the filling stations? The ethanol sludge settles out at the bottom, so if the tank sits, you could be pumping nearly pure ethanol sludge into your tank. the tank I had put in when it boiled out of my filler was from a suspect station. I had noticed I couldn't hit normal speeds on that tank. I just filled up with gas from my regular station and it hasn't overflowed and I suddenly can hit normal speeds on the hills again.
'73 FJ40 - '85 FJ60 - '05 Tundra