| 1. | Use of residual fuel oil was more common in the past.
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| 2. | The unit produces gasoline by upgrading residual fuel from the primary distillation process.
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| 3. | Residual fuel oils are cheaper than clean, refined diesel oil, although they are dirtier.
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| 4. | Residual fuel's use in electrical generation has also decreased.
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| 5. | The ISO standard describe four qualities of distillate fuels and 10 qualities of residual fuels.
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| 6. | Burning fuel oil, particularly residual fuel oil, produces uniformly higher carbon dioxide emissions than natural gas.
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| 7. | The rest of the barrel is jet fuel, petrochemical stocks and the residual fuel used by utilities.
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| 8. | Fuels produced at the refinery include gasoline, jet fuel, distillate fuel and residual fuel and are sold on-island.
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| 9. | As prices rose, utilities and manufacturers that could switch to burning cheaper residual fuel and diesel did so.
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| 10. | Cetane numbers are tested using a special test engine and the existing engine was not made for residual fuels.
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