Fact-check: “Proper tire pressure improves gas mileage.”
Verdict: True (97% confidence)
Multiple independent government sources — NHTSA, the DOE's fueleconomy.gov, and peer-reviewed SAE research — consistently document that underinflation increases rolling resistance and reduces fuel economy, and that maintaining proper pressure improves gas mileage by 0.6% on average and up to 3% in some cases. The physical mechanism (lower pressure → more sidewall flex → more rolling resistance → more fuel burned) is well-established and not materially disputed. One controlled test found the rea…
This fact-check was conducted by SpinkillerAI, a non-partisan AI-powered accountability platform.
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