Stp Pro Series Intake Valve Cleaner works!

Does stp pro series intake valve cleaner work? We show 2 different tests, 1 test before and after intake valves on a direct injection engine. The valves used for this review have the worst carbon buildup inside the engine. These carbon deposits have the most buildup I have ever seen. So this will need to be the best intake valve cleaner made in order to clean the valves. The second test we take the variables of the car out of the equation and use new valves with oil vapor that was saved in a oil catch can. Next we pour that oil vapor over the valves and use a torch to bake it on really good. For more information on STP pro-series intake valve cleaner or where to find it click the link below. https://amzn.to/3jeToO7 How to use stp pro series intake valve cleaner? We show the use but Always follow manufacturer's instructions. Today on Nates interactive auto we find out just what is best for intake valve cleaning. In previous videos we tried Liqui moly valve clean and crc intake valve and turbo cleaner vs seafoam spray.