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the claim

Using premium gasoline in a car designed for regular gasoline damages the engine.

the verdict
INSUFFICIENT LEANING
Recorded sources
0 sources for · 3 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Is it true that using premium gasoline in a car designed for regular gasoline damages the engine?

Unclear. The retrieved items do not directly test whether premium gasoline damages an engine designed for regular. Two studies indicate premium fuel produced less knock, vibration, and particulate emissions than regular, and one survey shows regular-specified cars have octane requirements up to 97 RON, but none settles the damage question.

Verdict: PARTIAL LEAN · 0 sources for, 3 against · Last checked

The private library was unavailable for some searches in this check. Missing library results are not evidence against the claim.

Evidence against · 3
Experimental Investigation of Performance and Vibration Parameters of an Otto Cycle Engine Operated with Regular Gasoline, Premium Gasoline, Pure Ethanol and Mixture of Ethanol with Regular Gasoline
2024
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Santana, C. M., Santana, L. L. B., & Almeida, H. G. A. (2024). Experimental Investigation of Performance and Vibration Parameters of
                    an Otto Cycle Engine Operated with Regular Gasoline, Premium Gasoline, Pure
                    Ethanol and Mixture of Ethanol with Regular Gasoline. doi.org. https://doi.org/10.4271/2024-36-0001

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More against · 2
Chemical composition and source of fine and nanoparticles from recent direct injection gasoline passenger cars: Effects of fuel and ambient temperature
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Chemical composition and source of fine and nanoparticles from recent direct injection gasoline passenger cars: Effects of fuel and ambient temperature. (n.d.). cir.nii.ac.jp. https://doi.org/10.1016/j.atmosenv.2015.11.017

１９９９年度国産乗用車のオクタン価要求値調査結果
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１９９９年度国産乗用車のオクタン価要求値調査結果. (n.d.). cir.nii.ac.jp. https://doi.org/10.1627/jpi1958.44.56

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