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I wonder how well this grill blocking works. For myself, I would block the grill to make it flush with the front of the car. I don't understand the physics behind creating a wall 3-4" past the front of the car. Isn't the idea to have the air flow past(over, under, beside) the car smoothly, not slam into a solid wall? Just wondering
It works pretty good. This guy even removed the wiper blades and tapped the ends for a mpg competition and achieved 74.1 mpg.
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View my fuel log 2014 Mirage ES 1.2 automatic: 37.6 mpg (US) ... 16.0 km/L ... 6.3 L/100 km ... 45.2 mpg (Imp)