Re: 36 Gallon Fuel Tank Option on Ecoboost F150s!
Just a theory, but the EPA fuel economy drive cycles are run with a full tank. It's possible that the extra 65 lbs in gasoline would have dropped either the city or highway (or both) cycles by 1 mpg on the sticker, which is extremely valuable from a marketing position.
Similarly, I know that the orginal Ford Escape Hybrid had a "rated capacity" on the fuel tank (and stop trigger for the gas pump) that was below the max orignal capacity, because if it were full, it would push it into the next EPA vehicle class per its weight. Heard this directly from a Ford engineer during a lecture at a univerisity some 5 years ago.
Thats very interesting. This theory has been kicked around but nobody can or will confirm it. Its like a dirty secret. I guess though it begs the question why they cant make the big tank an option if what you say is true and try to skirt the epa with the smaller one? They take the highest geared rear ends to the tests. I have read a lot about it but never got a clear cut answer from anybody.