Check out the link below. There is a chat transcript with Tadge Juechter. Tadge is the Vehicle Chief Engineer for the Corvette ZR1. He answers many great questions about the ZR1 including is fuel mileage. Final number are not in yet. However, it will be somewhat less than a Z06 and he expects a small gas guzzler tax. The ZR1 will be the most fuel efficient 600 hp car you can buy in the world.
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