BerrymanProducts 2611 Intake Valve and Combustion Chamber Cleaner, 16-Ounce Aerosol

My go to is either this product or Mopar combustion chamber clear, and this one was on par with the Mopar cleaner. I used this on my 2018 JEEP SRT 6.4L hemi. I had some build up in my intake valves after a I had oil introduced into the combustion chamber due to failed intake manifold gaskets. Upon using the product my Jeep had a cloud of white smoke come out. I shut off the vehicle, turned it on after 30 minutes, drove it around and did a couple WOT pulls and man, that cloud was DENSE. Although I did have pending misfire codes and more codes, it cleared up and had been driving significantly better and smoother since it was cleaned, I would 100% recommend this product.

Super simple to use. Followed the directions on the box and had a bunch of carbon burn off. No check engine lights or problems of any kind. Throttle seems more responsive now. My car is a GDI and has 41000 so I may do a second treatment to be sure.

I dont know of how "well" it worked as I didn't have any issues to begin with. My wife has a 2019 Ford Escape 1.5 turbo GDI. I wanted to try and be proactive and run a cleaner through the intake to clean the valves. I liked this kit because it has many different fittings, hose barbs, and tiny hoses in the kit to make it easy to connect to a vaccum line or spray directly in the intake. I also like that the spray nozzle locks so you can let it spray while you get back in the car and give it some RPM if you need to.That's what I can say that makes it 5 stars for me. Just the ease of getting it into the engine. Since berryman makes good products I assume it works as described.

2016 Mazda CX5 with SKYACTIV GDI engine and 56k miles. Thought it was time to clean the intake valves as a preventive measure. I bought this kit because I liked the thought that went into it with adapters and flow control devices to make the job easier and they did. I used the silver flow control device for my 4 cylinder engine then assembled tubing and yellow straw as directed. Then I loosened the air intake tube just upstream of the throttle body, inserted the curved yellow straw as directed, reassembled the air intake tube, idled the engine, locked the can button and started injecting the solvent until it ran out. Then it was a simple matter to remove the straw and button everything back up.I noted that with the silver flow control I did not choke the engine so it idled smoothly during the process.The car started right up but I made the mistake of not taking it easy to burn off any excess fluid and I stepped on it to test. Big mistake. The car stumbled, threw a code and went into 10 mph limp mode. Got home, erased the code and all was well. Lesson learned. In the end, the process was so easy that I won't hesitate to do it at every oil change.

Administered this through the throttle body on a Nissan VQ35DD (Direct Injected) engine with 90,000 miles with no history of intake valve cleaning, which is a must for vehicles with direct injected engines. After letting it sit for 30-40 minutes, I went for a spirited drive that produced massive smoke clouds, like I was a diesel truck "rolling coal". The vehicle drives a lot better now, along with remediating the issue of pinging caused by carbon buildup on the valves. I will use another can in a month, then plan on doing this annually to keep the carbon deposits down.

This product is freakin amazing. Ignore the negative reviews, those are people who have no clue. I ran one can through my 2012 Jeep Liberty V6 that was getting 12-16MPG and had poor pedal response and no acceleration. I had put plugs and wires, air filter because we just bought it for my daughter and it had 118k miles on it. We took compression test and it was fine. Narrowed it down to possible carbon buildup. Well CARBON BUILDUP INDEED! This thing smoked during the entire can during idle and almost none when driving. Immediate increase in acceleration. Fuel mileage restored to 15-19MPG, which for 118k miles is good enough! I felt the car had more to give so today (a week after the first can) I ran a second can through. This time it did not smoke during idle, but on the road test it burped quite a bit of smoke and the check engine lite came on and went off. no big deal. I was right, she did have more to give! I got MORE acceleration the 2nd time! At the time of writing this, I did not have the mileage into it to retest the MPG, but I will this weekend. I suspect 16-20MPG now. FREAKIN AMAZING STUFF for under $40! NO brainer!I also ran a can through my son's 2014 Chevy Sonic 4cyl (68k miles) and it did not smoke at idle. During the road test, It was sputtering badly to the point I had to use manual shift to rev up the RPM's. Check engine lite blinking. I stopped, let the engine recover and pulled out onto the main road. It started to accelerate and then almost died. I lost all power momentarily. Then this Hiroshima cloud came out the tailpipe, HOLY CRAP WAS THAT A MASSIVE DENSE CLOUD! Afte that, it cleared up and once again, we got the same results, much better acceleration and a 2.4MPG increase, it now gets 29MPG city! (prior was 26.6MPG).I ordered 2 more cans to run through my 2012 Silverado with 788K and my wife's 2017 wrangler with 50k.These cans are worth the investment, you immediately get it back and then some in recaptured MPG, let alone the better performance factor.