In every magazine article I have ever read, a smaller turbo motor as compared to an equivelently powered larger n/a motor, has hardly any real gain in fuel mileage. A few months back Car and Driver had an article on this exact point.
Case in point the Chevy Cruize with the 1.3L turbo as compared to the other cars in a recent test (Focus, Mazda 3, Elantra, and Jetta) with lager motors from 2L to 2.4L were faster and got the same or better gas mileage.
I just don't see the advantage, and the way BMW can't build a reliable turbo to save their ass, I'll say "No Thanks".
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