Almost all one needs to know about fuel seems to be detailed here!
Introduction of E10 Fuel Volatility ...
www.fbhvc.co.uk
But as said above, basically avoid E10 like the plague. You can use additives like Millers EPS, or stay with the higher octane fuels that have a lower Ethanol content.
Over here I have found that using 98 Octane works out cheaper than adding EPS, and the 98 here has a low Ethanol content. And, the car seems to prefer the higher rating!