| 11. | The octane rating of typical commercially available gasoline varies by country.
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| 12. | The octane rating of propane is relatively high at 110.
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| 13. | There are other products in the alkylate, so the octane rating will vary accordingly.
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| 14. | Gasoline sold in most countries carries a published octane rating.
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| 15. | Since isooctane has an octane rating of 100, why aren't automobiles fueled with pure isooctane?
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| 16. | The maximum octane rating in California is generally 91.
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| 17. | For spark-ignition engines the fuel has an octane rating.
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| 18. | Some fuels have an octane rating higher than 100, notably those containing methanol or ethanol.
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| 19. | The octane rating was developed by chemist Russell Marker at the Ethyl Corporation in 1926.
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| 20. | Octane rating boosting through additives was a line of research being explored at the time.
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