Indeed, why should green cars like the Volkswagen Jetta TDI get a lower grade?

Who benefits? Government Motors and their electric lemon, the Chevy Volt — “a vehicle that costs $41,000 but offers the performance and interior space of a $15,000 economy car.” Even in the Obama administration’s ill-advised (and thus seemingly politically-motivated) IPO, the US government is selling only enough equity to relinquish its controlling stake. That the EPA gives no weight to the purchase cost in its grading system tells you that the proposal is not about consumers making more informed choices. That the enviro-friendly Obama administration does not propose labels informing consumers of the environmental impact of the (typically coal-generated) electricity used to charge electric cars helps stack the deck further.