E15?

Does the manual say E15 is OK? I would ask your Honda dealer about this. You will get poorer fuel economy so I advise sticking with E10 or 100% gas if you can get it.

Put 14 gallons of E15 in my 2006 Odyssey. Triggered the "check engine light," and disabled the "economy" VCM system. Had the light reset -- "Both Banks Running Lean," and it triggered again. Drove 300 hwy miles and burned up all that E15. Refilled. No "check engin light," and VCM working like normal.

Using fuels with percentages of ethanol or methanol higher than 10% (E10) will cause starting and/or performance problems. It can also damage metal, rubber, and plastic fuel system components that are not covered under the Distributor’s Limited Warranty .

Ethanol/alcohol is corrosive to tane-based fuel systems, but systems designed to run those additives are built for it. E10 based fuel systems accept alcohol fuels up to 10%, and should never receive anything higher, like E85. Each vehicle has an owners manual that tells you which fuels may be used. You may also find this printed next to the filler port on the car.

Alcohol/Ethanol has properties that contribute differently to performance: Ethanol burns cooler than petroleum, so it raises effective Octane ratings; Ethanol contains less energy, by about 33%, so it lowers fuel economy; Ethanol doesn’t produce carbon when burned, so it does run cleaner and contributes little to deterioration of Earth’s atmosphere. For a comparison of pure petroleum gasoline and Ethanol-blend gasolines, let’s use an example. Let’s say that you had been running Ethanol-free gasoline, 91 Octane, containing 91% Octane, 5% Septane, and 4% Additives, and that produced a fuel economy of 30 mpg. To create a 91 Octane equivalent with Ethanol, that’s made up of 10% Ethanol (E-10), the petroleum base is altered. Ethanol burns cooler than petroleum, so you blend Ethanol with 87 Octane petroleum gasoline to get an effective Octane equivalent of 91. As Ethanol contains less energy, your fuel economy would be then reduced to about 27 mph.