Some of these suggestions could be considered a bit "extreme" by some (swap in a diesel engine & manual trans, for example). I looked back and saw MADMIKE, the OP, only posted the once and didn't give any indication of "how far" he was willing to go.
However, it looked like his MPG goals weren't "crazy", just a couple more than EPA. As we all know, beating EPA shouldn't be too terribly tough without going "crazy".
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