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Imported crude oil burned as fuel
- Imported crude oil burned as fuel
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Impoundment
- Impoundment
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Improved recovery
- Improved recovery
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Indirect-injection engine
- Indirect-injection engine
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Intermediate grade gasoline
- Intermediate grade gasoline
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International bunker fuels
- International bunker fuels
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Interruptible gas
- Interruptible gas
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Interstate pipeline
- Interstate pipeline
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Interstate pipeline purchase
- Interstate pipeline purchase
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Isobutane (C4H10)
- Isobutane (C4H10)
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Isobutylene (C4H8)
- Isobutylene (C4H8)
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