Quote:
Originally Posted by NeilBlanchard
Wiper blades will make almost no difference to the drag.
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As Frank said, they don't make a difference if they are hiding in the angle made by the bonnet and the windshield.
On cars where the bonnet and windshield form (nearly) one line like the prius and others, there's no or not as big a bubble for the wipers to hide in.
Hiding the wipers is good practice as it reduces pedestrian injuries in case of an accident.