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According to the 2011 Ford Taurus Owner Guide :

The 3.5 liter V6 engine will run normally on ( " regular " unleaded , 87 octane ,

" premium " unleaded will provide improved performance )

The 3.5 liter Taurus SHO engine ( I believe that has twin turbochargers ) uses

" regular " unleaded , 87 octane or higher ( 91 octane or higher recommended

for best overall performance )

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12y ago

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