Geeezz,
I just bought a 2013 Silverado 1500 last night. It is E85 capable like they all are. I have never paid a whole lot of attention to E85 pumps to this point but I have certainly noticed them over the last couple years and don't envision any problem finding stations that supply it in the S. Central Wisconsin area. It sounds like from what I have read is that it is much more common in the Midwestern states where the corn is produced. But I would think it could easily be shipped as is gas and oil. I am undecided if I would give it a go or not. Probably I will at some point. My dealer said the truck will run fine on straight 87 octaine 10% gas or straight E85 or any combination of the two. He did mention that you should run the vehicle for at least a couple miles after changing fuels so that the on board computer has time to readjust the mixture before you stop or it is possible that I would encounter a check engine light the next time I restart the vehicle.
In the end, it is really a bottom line issue. Which is cheaper to run per mile?
Bruce
Bruce