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According to the 1999 Ford F-150 Owner Guide :

The 5.4 litre V8 engine takes ( " regular " unleaded gasoline , 87 octane )

* as long as it is not the supercharged 5.4 in the " Lightning " model , that's

" premium " unleaded , 91 octane or higher

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Q: What kind of gas for a f-150 xlt V 8 5.4 1999?
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