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91 or Greater

Discussion in 'Chevy Silverado Forum (GMC Sierra)' started by mtunney, Jul 15, 2007.

  1. mtunney

    mtunney New Member

    I have the '06 8 cylinder 6.0L vortec max package and it recommends fuel of 91 or greater and I'm just curious if anyone out there has tried to put regular in there or if it has any bearing on anything at all.

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