Filled the tank of the evo last night for $25!!!

[asshanson]

I think there is a decent safety margin, but one time mine would get super rich and sputter at WOT. At first I thought it was plugs or wires, but I refilled the tank after it was mostly empty and the problem went away and went back to my previous AFR of around 11.

On another note, regular is $1.62 here, while E85 remains at $1.55, not much savings, but I completely filled the tank from nearly empty for like $20, it was glorious.