probably going a bit off topic here but sounds to me E10 is like the "lets force every body green by making them use "compact fluros"...thing is you know how much manufacturing and resources go into producing that as opposed to the good old filament bulb..and considering most are cheaply made crap theses days how much more often they'll fail & waste they create etc as they break down..
LED lighting might be a better idea when it fully matures..but going cheap again we will have the same problem..you need them to last for many years without fail to benefit over all, as far as I am concerned & thats not what our worlds about as you pointed out
from what you say Mr Davis thats kinda seems the case with E10
good idea maybe (if motor system can properly use it)
but not very well thought thorough as a total replacement system
So back on topic whats the idea behind phasing unleaded 91 out? anyway I dont drive so fuel to me is sort of a non event..
this world seems full of not very well thought through green ideas

again thanks