the fuel system degradation does not apply in your case bud, your truck is designed to runon 85% ethanol, so your fuel system is equipped to handle it.
Yeah I know my truck is flexfuel. But my wife's car, my bike, all my small engine equipment, etc are not. It REALLY tears apart the small engines. I have rebuilt the carb on my mower 2 times last year as it just eats away the gaskets/seals/orings.