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The fuel mileage on my '02 ZR2 sucks, never better than 16mpg. I'm gonna install a K&N hoping that it'll improve a little and I'm considering a hyperchip also. So, I'm wondering if anyone out there has installed a hyperchip could tell me how it affected fuel consumption better or worse? Also, is the performance gain from the chip worth the cost? I gotta do something, this truck is a dog and it sucks fuel like a monster.