OK, I understand the importance of fuel filtration, particularly with the solvency of E85. But, what does that have to do with the fact that ethanol fuel simply contains less energy? How do you explain similar fuel consumption in your anecdotal testing, from a fuel that doesn't have as much energy to provide to the engine? If everything worked perfectly, you would still use approximately 22% more.

Your comments regarding no-name stations, and filling up while a tanker is unloading, illustrate why that should never be part of anyone's routine. Keep to large name brand stations, and never fill up while fuel is being unloaded. Both are even more important if you move back and forth between gasoline and E85, as the ethanol will carry the water in suspension, instead of leaving it at the bottom of the fuel tank.

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2007 X3 3.0si, 6 MT, Premium, White

Retired:
2008 535i, 6 MT, M Sport, Premium, Space Grey
2003 X5 3.0 Steptronic, Premium, Titanium Silver
2002 325xi 5 MT, Steel Grey
2004 Z4 3.0 Premium, Sport, SMG, Maldives Blue