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Twice the air flow per square foot of radiator frontal area, plus all the turns, will restrict air flow and cause cooling problems on hot days.
Better to put in an oversize radiator. The larger radiator will give better air temperature rise, which will give the same total cooling using less air. Less air through the radiator is less air drag. Such a system may need diverging vanes to spread the air from the small grille opening evenly over the entire radiator.
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06 Canyon: The vacuum gauge plus wheel covers helped increase summer 2015 mileage to 38.5 MPG, while summer 2016 mileage was 38.6 MPG without the wheel covers. Drove 33,021 miles 2016-2018 at 35.00 MPG.
22 Maverick: Summer 2022 burned 62.74 gallons in 3145.1 miles for 50.1 MPG. Winter 2023-2024 - 2416.7 miles, 58.66 gallons for 41 MPG.
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