Quote:
Originally Posted by dmafanp
It is an aftermarket grill, but it comes stock in the hybrid jettas I got the grill on e bay 125$ cdn it has improved my mpg about 3-4% just by adding the upper grill . Getting a black car was a must the black hood keeps the engine hotter longer in the winter
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Have you tested this? Black is a good absorber but also a good radiator. White absorbs less energy but radiates less as well.
This is why factory radiators are coated in black for more heat exchange.