I think you're confusing two posts here--Frank is well-known here on the board, he likes to make his points in a manner that is both laconic and sarcastic. And sometimes his points are made simply to "stir the pot".
Mwebb is the one who challenged you to provide proof. I think he was confusing engine efficiency and fuel consumption, which is easy to do. Too bad he tried making his point in a very combative (and pretty obnoxious) way...
-soD
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