Hey guys,
We always hear about how people use fuel system cleaners to clean the engine but unless you have a dirty injector with a misfire, who knows if the fuel cleaners actually do anything?!?!

I tested, before and after, using Gumout "All in one" fuel system cleaner which claims after one use, you will see results. I used a borescope camera to see inside the engine.

Let me know what you think!