I use E10 all the time in my 2011 SR5 Hilux and in the 2011 RX350. Both seem to get the same economy regardless of whether I use E10 or 95 or 98. The only fuel the Hilux doesn't like is normal 91 and haven't tried it in the Lexus. So I can't justify the 15-25c/litre more for 98 over E10 for no gain. I run a tank of 98 maybe every 7-8 tanks to give it a flush. When I get a chance to get the new exhaust on the Hilux and put the twin tune XEDE processor in I plan to get it dynoed with maybe 1/8 of a tank of E10 in it, and then flip the switch to the 98 fuel position and dump 20L of 98 into the tank and dyno it again. Will be interesting to see what difference it makes.

As I said I used to use Bogas E10 in the late 80's - early 90's in the Hunter area. They were making E10 way back then. I remember pulling the head off the 202 in the WB tonner and noticing how clean it was, the denatured Ethanol (metho) used in the E10 was doing a great job of keeping the combustion chambers clean. Not sure if the actual ULP fuel quality that was blended with the denatured ethanol was better back then than it is today, as I've heard some cars actually cake up with carbon using E10 today.