This is the first test in a series of fuel cleaner test I will be performing to see how fuel cleaners work and if they actually work. In this video I tested Gumout "All in one" fuel system cleaner. I use a mini borescope camera to look into the engine and see how dirty the engine is before the fuel treatment and then after the fuel treatment. 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. 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/2tHByMQ Here is the follow up video after using the second bottle of Gumout Test: https://www.youtube.com/watch?v=wJSIHGDwMtU 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 *If the video was helpful, remember to give it a "thumbs up" and consider subscribing. New videos every Thursday* -Website: https://www.ChrisFixed.com/ -Facebook: https://www.facebook.com/chrisfix8 -Twitter: https://twitter.com/ChrisFixed -Instagram: https://instagram.com/chrisfixit -Subscribe Here: null -YouTube Channel: null Disclaimer: Due to factors beyond the control of ChrisFix, I cannot guarantee against improper use or unauthorized modifications of this information. ChrisFix assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. Use this information at your own risk. ChrisFix recommends safe practices when working on vehicles and or with tools seen or implied in this video. Due to factors beyond the control of ChrisFix, no information contained in this video shall create any expressed or implied warranty or guarantee of any particular result. Any injury, damage, or loss that may result from improper use of these tools, equipment, or from the information contained in this video is the sole responsibility of the user and not ChrisFix.