| 21. | Where fuel quality is low and octane rating is poor, compression ratios will be restricted.
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| 22. | Gasoline is produced in several grades of octane rating.
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| 23. | Ethanol is used to boost octane ratings in gasoline.
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| 24. | Also, his 2, 200 workers are producing lower quality gasoline with an octane rating of 81.
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| 25. | The manufacturer recommends the use of unleaded gasoline with an octane rating of at least 95.
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| 26. | Gasoline produced from the Green Crude achieved a 91 octane rating while meeting fuel quality standards.
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| 27. | The octane rating of a given fuel is a measure of the fuel's resistance to self-ignition.
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| 28. | Phillips turned to technology to increase the octane rating of fuels for use in advanced engines.
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| 29. | Conversely, a fuel with lower octane rating is more prone to knocking and will lower efficiency.
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| 30. | Direct cylinder injection raises the already high octane rating of ethanol up to an effective 130.
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