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  1. #1

    Default 09 silverado question regarding gas.

    ok im looking to pick up a new silverado crew cab, but i seen they have an ethonal ffv truck with a 5.3. my question is do i have to run this ethonal blend gas or can i run regular 87,89,91 gas in it??? im just a little confused on this new ethonal gas mixture.

    oh sorry just noticed i posted in the wrong section. if need be please move to right section thanks.
    Last edited by Jestor; 09-01-2009 at 10:48 PM. Reason: wrong section

  2. #2
    Legend s5belford's Avatar
    Join Date
    Apr 2009
    Kalamazoo Michigan


    I have the flexfuel on mine and you can run either, but I always run 87, the milage with e-85 is garbage


    2009 Silverado LT1: All Star Edition
    5.3 Liter V8 4x4

    Locking Rear Differential
    3.73 Rear Axle
    Fog Lamps
    Factory Remote Start
    Locking Tailgate
    20" Wheels

    Rear Wheel House Liners
    Molded Mud Flaps
    Stainless Nurf Bars
    Driver Information Center
    20% Tinted Windows
    Low Profile Diamond Plate Tool Box
    GM Bed Liner
    Silver Birch Metallic Mirror Covers
    Silver Birch Metallic Vent Visors
    Flowmaster Super 40 (knock off)
    20" Wheels
    Bed Rail Protectors
    Extang Tonneau Cover

  3. #3
    Legend s5belford's Avatar
    Join Date
    Apr 2009
    Kalamazoo Michigan


    p.s. you don't have to mix anything but if you do it isn't suppose to hurt anything

  4. #4


    nice, thanks bro. now i can move forward and continue looking for my new truck.

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