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  1. #1
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    Default Anyone ever use dex 3 tranny fluid as a fuel system cleaner?

    Talking to a GM tech and he was saying how they would dump a quart in a tank of gas and it would clean the fuel system and valves better than any fuel injector cleaning .

    Anyone ever tried this?


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  2. #2
    Turbo is the way to go. Fivefingerdeathpunch's Avatar
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    Default Re: Anyone ever use dex 3 tranny fluid as a fuel system cleaner?

    Done it before, it works.

    On vehicles with filters, I'd maybe change it afterwards. Most newer vehicles just have socks on the pump now anyway.

    SMGPFC Member #1

  3. #3
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    Default Re: Anyone ever use dex 3 tranny fluid as a fuel system cleaner?

    Yup, it's all I've ever used. Seems to work well. I've never changed the filter after.
    1998 Grand Prix GTP aka The Family Sedan
    CAI, 1.8 rockers, U-bend delete, 3.4 pulley, tuned by me
    1999 Turbo Grand Prix
    L36 turbo build in progress

  4. #4
    GTP Level Member buickman104's Avatar
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    Default Re: Anyone ever use dex 3 tranny fluid as a fuel system cleaner?

    Does it foul up the plugs? I wanna give this a shot!
    2000 Bronze Metallic GTP
    Power :Gen V, 3.6 pulley, 3 inch down pipe, Power log, FWI,and DHP Power Tuner,
    Handling: Vogtland Springs, GMPP sway bars, STBS, 18" Konig backbone, CTS-V Front brakes and GXP rear brakes

  5. #5
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    Default Re: Anyone ever use dex 3 tranny fluid as a fuel system cleaner?

    Ok. I will it a shot.


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  6. #6
    GrandPrix Junkie Bronco Boy's Avatar
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    Default Re: Anyone ever use dex 3 tranny fluid as a fuel system cleaner?

    A small amount of water makes for a nice steam clean too.
    Chris B
    2002 GT

  7. #7
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    Default Re: Anyone ever use dex 3 tranny fluid as a fuel system cleaner?

    Well I burned up the tank 400 miles and no issues. Seems a little more responsive but that could just be the mind at work. At least I didn't throw any codes or need a tow. Might try it on some of my other vehicles.


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  8. #8
    GrandPrix Junkie spazzz's Avatar
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    Default Re: Anyone ever use dex 3 tranny fluid as a fuel system cleaner?

    how much did you dump in to how many gallons?

  9. #9
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    Default Re: Anyone ever use dex 3 tranny fluid as a fuel system cleaner?

    1 quart in the GP tank. 16-17 gallons.


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