Could someone tell me how much of the GM card earnings can be used in a purchase of a ZL1?
Most of the reviews I've read simple state that the ZL1 is an engineering cycle ahead of the GT500. It's just a more syphisticated car. While the GT500 avoids a gas guxzzler tax. A quick calculation revealed it would take 14 years to spend the extra cost of the GT500 in gas.
Unfortunately the GT500 does beat the in all acceleration perameters, and at Laguna Seca (for one lap). But unless you are a dedicated track racer, so what? At these power levels it's subjective. The Zl1 just seems to be the better car.