thanks. Interesting sections in the article on emissions control and H20 conatmination effects, but I though it curious that there was no mention of CO2 reduction relative to gasoline- one of the primary drivers, I thought, behind going with ethanol.

It seems as though as long as one keeps the CEL off, the computer can more or less handle it.

I'll try 25% or so in the old Explorer- the only documented difference between the FFV and non-FFV version is in the software. After I see the effects there, I may try the HAH when I feel bold.