[JamesAvery22]

To add onto jaydee,
Even though the car is new doesn't mean the design of many of the parts that make up said car are new... Those types of radiators, as well as many other parts in the car, have been around for a long time. Manufacturing plants/lines for those kind of re-used designs in turn have been around for a long time. The older those types of places get the more efficient and cost effective they become. Its not like you can just switch materials from aluminum to copper and up the costs just a little. As jaydee said there is no need for a copper radiator so there is no justification or market for a company to blow away an entire plant and start over so they can use copper.