this is a tricky one. e 10 fuel from my experience sucks. gotta read the pump. see what it is really. and not just that octane rating. that does vary. thats why they have the mathematicle equation on most pumps. all fuel is so not created equal. if using an e 10 fuel, add some startron or the blue stabil to your tank when you fill up. in my bikes i notice huge differences. as for my truck, its minor and good just to do so often. i have friends that do fuel blending here and jersey and i do some work for the guys at a huge refinery wich i cant say wich one.