The results showed that bug deflectors most likely reduce your fuel economy between 1-3% –but that’s only when you’re traveling at highway speeds. Studies from Canada’s National Research Council (along with Clarkson University) took a look at how drag from bug deflectors might impact your truck’s fuel mileage. Photo copyright Steven Vance What Effect Does It Have On Gas Mileage?īug deflectors can reduce gas mileage, but not by any significant amount. Only buy bug deflectors you know have been wind tunnel tested. This is a lengthy, expensive process, and there can be no shortcuts when developing a quality product. Good bug shields are molded using computational fluid dynamics software, then wind tunnel tested. There are steps you, the consumer, can take to make sure you’re getting a quality deflector for your truck’s windshield. You’ll run into the same problem if the deflector is angled too flat.įinding a good bug deflector design isn’t always as straightforward as finding a good shape or angle. If the angle is too steep, to the point where it’s sitting upright on your hood, it won’t be able to change the airflow around your car enough to make a difference. The angle it sits at will also tell you how effective it is. The quality of a bug deflector isn’t just determined by its shape. Whether you own a GM, Ford, Toyota, or some other truck, you’re going to find a bug deflector in a different style for each make. Not every bug deflector is made equal they all have different designs, and these different designs channel airflow in different ways. That’s because there isn’t a great deal of evidence proving, or disproving, how effective they are at their job. The effectiveness of bug deflectors, or bug shields, is often up for debate. They also absorb the impact of common road debris, like rocks, sand and gravel, so they don’t chip your windshield. They’re designed to channel airflow around your truck so you don’t get as many bugs on your windshield. These gadgets sound useful, but how effective are they really at keeping your windshield clean? It depends on what bug deflector you buy.īug deflectors are thin plastic strips that attach to your front hood. These deflectors move air up and over so bugs and other debris go above your windshield. Have you heard about bug deflectors? These small pieces of plastic help rework the airflow at the front of your vehicle.
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