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Thread: GDI Carbon Buildup Maintenance

  1. #16
    Guest201874
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    I think the key is regular maintenance with fuel system cleaners and maybe a Seafoam treatment every 25000 miles. A clean PCV and the right oil will also help.

    No doubt some of the horrific photos of valves are from those who never cleaned and used cheap gas to boot.

  2. #17
    Registered Member

    2014 mazda cx-5 touring FWD

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    Call me old fashioned but I'm of the opinion of"if it ain't broke,don't fix it".If it runs good and gets good fuel mileage I see no need to introduce various cleaners or tear into the engine to manually clean carbon.It's easy to get caught up in the "over maintain it " mindset without realizing it.There's alot of "miracle products" on the auto parts store shelves just waiting to correct your car's possible or perceived problem.
    Maybe my thoughts will change in time as the car gets more miles and age on it.Just my .02. Jmaz

  3. #18
    Registered Member erhayes's Avatar
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    Mazda CX-5 FWD Touring

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    +1 and it appears that MAZDA doesn't have the issue that some other manufactures have. ed

  4. #19
    Registered Member CX-5um's Avatar

    13' CX-5 and 16' Mazda6 both Touring w/Tech/Bose

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    Quote Originally Posted by Chris_Top_Her View Post
    You can use CRC GDI intake cleaner through a vacuum line (or the fresh air hose inlet past the maf). I've done it before (twice) no adverse side effect.. but I drive my engine high rpms normally and have an oil catch can so probably won't have as much build up
    I saw a video on YouTube of a mechanic spraying CRC GDI unto a really carbonated BMW turbo engine directly unto the valves. I saw the product started to bubble up and dissolve the carbon. It must be really effective stuff!!! I think I'll do it before each oil change. I heard nothing but good reviews from knowledge people. The only negative reviews involved inproper application. You have to spray it AFTER the MAF sensor.

    That said where is the said vacuum line?

  5. #20
    Registrierte Benutzer Chris_Top_Her's Avatar
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    '15 CX-5 Miata GT AWD w/Tech 2.5L

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    Talks about GDI and carbon on valves


  6. #21
    Registrierte Benutzer Chris_Top_Her's Avatar
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    '15 CX-5 Miata GT AWD w/Tech 2.5L

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    Quote Originally Posted by CX-5um View Post
    I saw a video on YouTube of a mechanic spraying CRC GDI unto a really carbonated BMW turbo engine directly unto the valves. I saw the product started to bubble up and dissolve the carbon. It must be really effective stuff!!! I think I'll do it before each oil change. I heard nothing but good reviews from knowledge people. The only negative reviews involved inproper application. You have to spray it AFTER the MAF sensor.

    That said where is the said vacuum line?
    Would be better for me to post a pic later
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