I have used and tested E10 in my 2007 and can tell you without any hesitation, "it isn't worth it" compared to unleaded 87. I have kept careful track of vehicle mileage with and without E10. Bottom line, I got an average of .4 to .5 mpg less with E10, every time, regardless of driving type, city,highway or combination of the two. In my area, Boise, Idaho Sinclair Stinker Stations sell E10 and I compared 8 tank fulls anternating with Chevron 87 octane regular unleaded. Sinclair E10 costs on average 10 cents a gallon more than 87 regular unleaded in this area. At 10 cents a gallon premium and 1/2 mpg less, it's a no brainer. Truck runs fine on E10, but the fuel simply doesn't have the same energy as unleaded gasoline, the octane is higher, but that doesn't translate to more energy. /Brad