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the claim

Using regular gasoline in an engine that recommends premium fuel damages the engine.

the verdict
INSUFFICIENT LEANING
Recorded sources
4 sources for · 0 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 regular gasoline in an engine that recommends premium fuel damages the engine?

Unclear. Several engine studies indicate regular gasoline in engines tuned for higher-octane fuel produces more knock and pre-ignition, and one forum test found premium fuel gave more power, but none of the retrieved items directly shows that using regular gasoline damages the engine.

Verdict: PARTIAL LEAN · 4 sources for, 0 against · Last checked

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

Evidence for · 4
Is premium fuel "better"?
2011
Get citation
Is premium fuel "better"?. (2011). skeptics.stackexchange.com. https://skeptics.stackexchange.com/questions/3359/is-premium-fuel-better

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More for · 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

HC1-3: Combustion Analysis in a Conceptive High CR Gasoline Engine Operated with Fuel Treatment(HC: HCCI Combustion,General Session Papers)
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HC1-3: Combustion Analysis in a Conceptive High CR Gasoline Engine Operated with Fuel Treatment(HC: HCCI Combustion,General Session Papers). (n.d.). cir.nii.ac.jp. https://doi.org/10.1299/jmsesdm.2008.7.275

Research on Super-Lean Burn Spark Ignition Engine with In-Cylinder Water Injection using Gasoline Surrogate Fuels
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Research on Super-Lean Burn Spark Ignition Engine with In-Cylinder Water Injection using Gasoline Surrogate Fuels. (n.d.). cir.nii.ac.jp. https://doi.org/10.4271/2023-32-0055

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