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My 2002 Infiniti Q45 uses a great deal of aluminuum (hood, trunk, front fenders etc also engine parts) and other light metals in the design of the car.
It weighs in at 3800 lbs which was less any car in it's class by 500 lbs.
It also came w/ a 2.76 rear ratio.
While I have done some aero mods, Inifiniti gave me a great starting point.
I get 31+ on the road w/ a factory hwy epa of 22mpg
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