Does Gumout Fuel System Cleaner Work (Follow up)?

This is the second test for Gumout All in One fuel cleaner to see if it actually removes carbon deposits. I use a mini borescope camera to look into the engine and see how dirty the engine is after the second fuel treatment.

Here is the First Video: https://www.youtube.com/watch?v=5SoZnymBSC8

CONCLUSION:
I followed the instructions on the container and Gumout fuel cleaner did a great job cleaning the shiny, sludge buildup, but did not work as well as I would have thought on the clumps of hard carbon buildup. Even after two bottles in a row, it did not clean the cylinders as much as I thought it would since they do say one bottle will clean the engine.

Here is the fuel cleaner I used: http://www.amazon.com/gp/product/B004AYTRU6/ref=as_li_tl?ie=UTF8&camp=1789&creative=390957&creativeASIN=B004AYTRU6&linkCode=as2&tag=chri0e2-20&linkId=RR7WMPOEKFYJEVRA
Here is the borescope camera I used: https://amzn.to/2SqMwyH

Gumout Test: https://www.youtube.com/watch?v=5SoZnymBSC8
Seafoam Test in Lawnmower: https://www.youtube.com/watch?v=WdT4DPFXIkM
Seafoam Test in a Car: https://www.youtube.com/watch?v=u6UeJXkzDW8
Techron Test: https://www.youtube.com/watch?v=h8i9qftqKNY
Lucas Deep Clean Test: https://www.youtube.com/watch?v=FLhXqgEEYyI
CleanBoost Maxx Test: https://www.youtube.com/watch?v=VDUogAQzLAc

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26 thoughts on “Does Gumout Fuel System Cleaner Work (Follow up)?

  1. I put the wrong gas in my Mazda, I accidentally put a 94 octane fuel and ever since I’ve had a horrible smell every time I’m stopped; smells like sulfur and exhaust. Do you think this will help?

  2. I don't think that it is realistic to expect any of these fuel system cleaners to work in one time use especially if the engine is very dirty…..plus they wouldnt make mush money of us if they did work the first time would they? If there is one out there that works the first time, it is more than likely very expensive…..

  3. By the time the these are cleaned the buyer would be nearly broke? Back in 1976 I had a car come in that was banging when it was running at that time General Motors was having some kind of trouble and they had a cleaner that you fed through the carburetor then shut it down and let it soak? When I started it up the top of the pistons had to be clean as the engine was as quiet as a new engine? What did GM use?

  4. I subscribed to your channel. What you recommend for code p0420 catalytic converter? I tried cataclean, then Rislone, engine light when off but now come on again. Don't know which cleaner additive use. Is a 131k miles scion iq. Any suggestions are welcome please.

  5. I don't believe the fuel additives will take carbon off Piston or valves. Even when taking apart an engine it is tough to wire brush carbon off internal engine parts. Even soaking the parts in cleaner doesn't do much. I do think it can help with the ethanol damage or helping injectors or carburetor internals stay clean. I love these videos.

  6. Did you ever consider running the engine at high rpm for short distance. Do this actually driving car and not in driveway so engine has a load on it. Safer on engine this way. We use to call it "getting the gunk out," it use to work on older cars but I haven t tried it on newer cars. Might be worth a try.

  7. As I said in your first video there is no magic potion that will remove 20 year old carbon as hard as concrete. Gumout should be use earlier in the engines life to remove early carbon and prevent future carbon build up. It's like fat people they eat too much for many years then spend thousands of dollars on pills some crook is selling, telling them that the fat will just fall off no diet or exercise required.

  8. Let me tell you something I use gumout all the time and gum out makes my car run like brand new it cleans the carbon deposits and everything I have a 2000 Camaro and it's almost got 300,000 miles on it after every oil change I put gumout in it.. it cleans the carbons and dirt out of my gas tank before my car could barely make it to 80 miles an hour after using the gumout constantly it's now running 120 140 mph and faster… horsepower and torque restored only thing after you put it in if you go to a cheap service station like El Cheapo it's going to let you know it cheap gas with water in it will cause it to hesitate you have to go to service stations with good clean gas.. it also works great in my 2002 Firebird runs like a champ

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