While that may be the case, you will need a tune for that much ethanol. The stock tune shoots for an afr too lean for high percentages of ethanol. Unless these trucks have sensors for ethanol content, in which case they would be flex fuel.Your Ford you have now has injectors capable of injecting up to 32% more fuel than neat gasoline stoichiometric ratio. Since ethanol has about 35% less energy, you need to inject more. Thus you can run "mid grades" of ethanol; up to about really 70% with stock equipment. Full flex vehicles come with larger injectors. Many times, it's not needed.
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