Maroon:

That is what I'm saying - the 0.8 MPG difference between B20 and dinodiesel that I saw on the last comparison may have nothing at all to do with different fuel. It could be different mix of driving, different amounts of pressure applied to the vertical pedal on the right, different use of A/C, any number of things.

I most definitely am surprised that the car runs so much smoother on B20. Would like to try a few tanks of stronger concentrations but can't find it anywhere around Atlanta. Sheer luck that the station near my office offers B20 - for the same price as 100% dinosaur juice.

I've searched all over the web locating bio stations - if anyone knows of locations offering other than B20 in Atlanta, I'm all ears.