Has anybody compared fuel consumption between E10 and E5. On mostly urban driving, a very rough check on my Xceed 1.4 DCT shows a reduction of about 4 miles per gallon. Deciding to take this further my rough back of a *** packet (remember those) calculations suggest that any reduction greater than 2 MPG would make Super(E5) fuel a better proposition. This is based on E10 @ £1.43 ltr and E10 @ £1.50 ltr. Just wondered if anyone has any figures that agree/disagree.