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The rated pressure is the cold pressure. The hot pressure is what it is.
Tires get hot from hysteresis loss caused by the rubber flexing. More pressure makes the rubber flex less, so the hot pressure is closer to the cold pressure.
It works the other way when the tire pressure is too low. That's why underinflated tires blow out.
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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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