Fuel Mileage booster’s

As stringent as the mileage requirements are year after year, I would think there's not enough room for a 55% increase, if there was, it would already be there.

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Back in 2008 I looked at the fuel economy rating for various world cars like Subaru Legacy, Toyota Camry, and such; I checked US, NZ/AU, and Europe. Some cars got 20% better economy in other world markets over the US. The stark difference was the VW Jetta Diesel; 43 MPG US and 72 MPG NZ/AU! Tried looking again recently, but I couldn't find the economy numbers very easily. Odd since that's something on everyone's mind.