Features:

  • Use in gas, ethanol/flex fuel, diesel & biodiesel engines
  • Restores fuel economy and improves engine performance
  • PEA (polyetheramine) effectively removes carbon deposits from the entire fuel & oil systems
  • Stabilizes fuel and oil for up to 2 years
  • Helps pass emissions testing, Lubricates upper cylinders, and Fights ethanol related rust & corrosion
Great stuff!

I used to use Chevron with Techron religiously. Never really noticed anything, but the car was running fine. I was watching Scotty K on Ytube and he mentioned this stuff and PEA so I decided to try it out. 2005 Ford Thunderbird that isn't driven too often. 1st can nothing really tangible that I could say, 2nd can, boom, it must have freed up some blockage, but the car ran with even more vigor. 3rd can, boom again! (again, I don't drive this car very often, but more so lately since it's summer out.)Something else opened up, the car runs great and smooth. I never knew the car when it was new, but I'd imagine that it ran they way it is running now. I'm using this in all my other cars as well, and a little in my lawn mower and trimmer. Hope they never discontinue this stuff. Thanks Gumout/Tool Works!

Gumout appears to be helping remove carbon from cylinder

I am using this to remove carbon from the inside of the cylinders. The car is being driven short distance to work and back and has developed a buildup of carbon in the exhaust manifold, EGR valve and secondary air, etc. I believe a cylinder misfire error code is because of carbon buildup in the cylinder. After using the Gumout, there is no more misfire error code so far so it seems to be doing the cleanup job and saving a huge repair bill.

Good stuff.

Good stuff buy discovered W-M has their brand for half the price.

but this works much better.

I used to use seafoam, but this works much better.

Good product that works.

Very good product to clean the injectors on your car. It contains polyetheramine (PEA) which does a good job cleaning injectors. I first used it on my 09 Forester and I actually noticed the engine had more acceleration. I have now bought it for our other 3 cars.

How to tell if its working?

I've been using it for many years with different cars. Not sure if it's working, but I've not had any issues with my fuel system even in the cold IN winters. I guess it's kind of like insurance. You pay the price and hope you never have to find out if was worth it. I watch and read the product reviews from the experts (????).

A hopefully good way to make amends for my non-top tier gasoline sins, and brought my riding lawn mower back to life!

I had heard about this stuff from the Scotty Kilmer channel and Engineering Explained on YouTube. I have recently been on a spirit quest to do excellent preventative maintenance on my 2007 Nissan Altima 2.5 S now that I am using it for Uber and Lyft; driving about 1000 miles more a month than I used to. I read recently about the Top Tier rating system for fuel products and I realized with a sink in my stomach that for the past 37000 miles, I have been filling up at the Pilot gas station that is five minutes away from my house and it is a non-Top Tier station. My car had had no problems with the engine or fuel system and still hasn't (knock on wood), but regardless I wanted to do something to try to correct 37000 miles of the gasoline sin of using non-Top Tier gas that lacks the amount and quality of detergents that your Top Tier stations like Shell and Chevron have. I drove my car to nearly empty and pulled into the Shell gas station nearest me. Given that I have a twenty gallon capacity tank, I dumped the entire bottle of the Gumout into my fuel tank and added a fill of gasoline–17.86 gallons–on top of it to mix it in as the instructions said to do. I then drove my car to nearly empty with the Gumout/Gas mixture and just did my second fill up with only a Top Tier gasoline. Because my car had no problems like rough idle, slow acceleration, or what have you to begin with, I cannot say I have "noticed" any difference; but that doesn't mean there wasn't. For seven bucks and being approved by many reputable mechanics, I don't think my money was wasted and now that I am using Top Tier gasoline only I feel better about the longevity and reduced need for repairs my car is hopefully going to have. In summary: My car didn't have anything noticeably wrong that would allow me to observe a noteworthy improvement, but it didn't hurt my car either as far as I can tell; and it has the right cleaners and such for modern fuel injected vehicles. With that uninspiring part of my review over, I can now get on to the really cool NOTICEABLE benefit this stuff had: it was the Dr. Frankenstein to my mower that had been sitting unused too long! I went out to the ranch I manage to do some mowing and to my disappointment, the mower was dead and would not even start. I replaced the battery and was able to get it to start, but the idle was extremely rough and within a minute it spluttered and died. Noticing that the tank was maybe only 10% full, I went and got five gallons of fuel and added about 5 ounces of Gumout as per the instructions for four stroke small motor gasoline. I filled the mower up, shook the mower and let it sit for a minute, went to start it up, and COUGH PUTT COUGH PUTT COOUGHH VROOOOOOOOOOOOMMMMM!!!!! That baby coughed whatever gunky fuel and deposits had clogged up the fuel line or something and fired up! It ran smoothly from startup to intentional shutdown and I knew that I had the Gumout to thank for that. A further benefit of the Gumout too is that it is apparently a fuel stabilizer, so the other 2.5 gallons that is going to sit untouched in the can for up to four months is going to be good to go! All in all, I am pleased with the stuff. Be an educated purchaser: do your research and make sure it is going to be correct and useful for your application, but sometimes it is just fun to use "snake oil" type items like this and just see what happens (when they have been approved for safety by the appropriate agencies when used according to instructions, of course). Thanks for reading my review, I hope it helps you to make your purchasing decision!

PEA is legit

For newer engines: DGI (direct gas) requires new tech cleaners for max effect. Always was a Seafoam fan for small engines and have used in plenty of autos...no more. Seafoam is decades old and really for marine applications. Upgrade yourself to this century and get the right fuel system cleaner, else why bother? Just spend the extra money on good Shell or Chevron gas instead. Honestly, I wonder if the old cleaners don't ‘cause’ problems in the new systems...I mean the oldies work in low pressure carb systems AND in 300+ psi DGI systems?!? Nah, I don’t buy that. Read non-Amazon reviews and tech sheets about PEA-based cleaners for deeper dive into what I’m saying. For new cars, this is the stuff to get, and the price is right.

Good stuff if you don’t mind using it for a while. I’d almost say better than SeaFoam, but that’s debatable.

The stuff works, but you have to use it many times consistently. Use it in every tank for a few months and you’ll be able to clean the nastiest deposits from your pistons. Here’s a recent borescope picture of a CP piston after using the product for about 4 full tanks of gas. My pistons had the same pitch black deposits you see on the sides, but all over the valve reliefs before and now they’re beginning to look much better. The intake valves look beautiful, but they’re stainless steel so they clean up easier, making it hard to predict how this product will work on stock valves. What I did: initially use it in about the same way you would SeaFoam, run it through a vacuum line on the intake manifold, but read the instructions first. It requires time to soak in while the engine sits for a while, then you drive it off on the highway. After that, use it in at least a few full tanks of gas and you should be able to notice a difference in idle quality, smoothness, and sometimes even acceleration (on higher mileage vehicles).

Recommended by YouTuber Scotty Kilmer. Modern fuel injector cleaner.

It is pretty difficult to judge whether or not a product like this has made a difference. I purchased this based on a video by Scotty Kilmer who is a youtube car guru who yells instead of talking about cars. (maybe he has too much caffeine before he records his videos) He talks about the active ingredients that are more appropriate for modern cars than Sea Foam. (this bottle looks like a bottle of Sea Foam oddly enough) I used it in the gas tank in an attempt to clean out old fuel injectors. The placebo effect is pretty strong when it comes to using additives. I hope it did clean the system and I could say that it did something perceivable but chances are that even if it did clean the injectors it would be a very subtle difference. With ethanol in our fuel in most states I'm not sure that is a big concern anymore. Scotty points out that the old 'carb cleaner' products do not contain the correct additives for our modern fuel injected cars but this product does contain the proper ingredients.

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