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This item is non-returnable due to its composition that makes it regulated for transportation, but if the item arrives damaged or defective, you may request a refund or replacement.
Read full return policy
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Cataclean 120018CAT CATACLEAN- GAS 3L FUEL/EXHAUST SYSTEM

4.1 4.1 out of 5 stars 1,184 ratings
Amazon's Choice highlights highly rated, well-priced products available to ship immediately.
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$43.95
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Purchase options and add-ons

  • 3L packaging â€" Treats up to 30 gallons of fuel
  • Packaging versions to cater to Gasoline, Diesel, and Marine markets
  • Safe for gasoline, E10, E15, and E85 fuels
  • Does not alter fuel composition
  • Restores, maintains & helps protect the catalytic converter, oxygen sensors, fuel injectors, and cylinder heads
› See more product details

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Cataclean 120018CAT CATACLEAN- GAS 3L FUEL/EXHAUST SYSTEM
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Product Description

Cataclean is the patented fuel and exhaust system cleaner that has been proven to reduce carbon build-up and also clean your vehicle's oxygen sensors, fuel injectors and cylinder heads. Excess carbon build-up robs your vehicle of horsepower, wastes fuel and increases emissions output. Cataclean helps to reduce carbon build-up and optimizes your vehicles complete powertrain. Cataclean eliminates fuel injector build-up cleaning the fuel system for maximum power production.

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Amazon.com Return Policy:Amazon.com Voluntary 30-Day Return Guarantee: You can return many items you have purchased within 30 days following delivery of the item to you. Our Voluntary 30-Day Return Guarantee does not affect your legal right of withdrawal in any way. You can find out more about the exceptions and conditions here.
Product Warranty: For warranty information about this product, please click here

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Cataclean 120018CAT CATACLEAN- GAS 3L FUEL/EXHAUST SYSTEM

Cataclean 120018CAT CATACLEAN- GAS 3L FUEL/EXHAUST SYSTEM

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Customer reviews

4.1 out of 5 stars
4.1 out of 5
1,184 global ratings

Customers say

Customers like how easy it is to use the product. They say it is simple and easy to use. They also like that it helps clear the catalytic converter. However, some customers have reported that the product does not work on damaged or clogged catalysers. Customers also dislike the check engine light. They disagree on performance, and quality.

AI-generated from the text of customer reviews

29 customers mention24 positive5 negative

Customers like the value of the auto part. They say that it's great value for the money, saves them a lot of money, and is way cheaper than a catalyst replacement.

"...But trying it is way cheaper than a catalyst replacement.- Double the concentration that they recommend.-..." Read more

"Lots cheaper and easier than replacing our old car’s cat. I used this product first time 4 years ago when emissions test was due...." Read more

"great value for the money" Read more

"...Amazing stuff! This is also a Great value compared to purchasingthe small bottles." Read more

11 customers mention8 positive3 negative

Customers generally like the cleaning of the auto part. They mention that it cleans out the fuel system and exhaust, making the cat clean enough to pass emissions. However, some customers say that the cleaner needs stronger cleaners.

"Second purchase, does good cleaning and my engine ran smoother after 1 treatment. Hi mileage on 4 cylinder...." Read more

"...No check engine light now. The cat is clean enough to pass emissions once again. The old Camry with 244,000 miles still runs like new...." Read more

"...ZERO change in how it ran and did not clean out the cat converter unit. Still have the dreaded P04200 code reading...." Read more

"...Goof Off through your motor, but I will say it does work and it does clean, I've taken out my o2 sensors after using it and they were clean brand..." Read more

6 customers mention6 positive0 negative

Customers find the auto part easy to use. They mention it's simple and helps clear the air filter.

"Lots cheaper and easier than replacing our old car’s cat. I used this product first time 4 years ago when emissions test was due...." Read more

"...For the availably, price, ease and type it's the best. I know there is better just can't afford them or getting it period has been a hassle." Read more

"This was a simple and easy product to use and helped clear the dreaded P420 code on my van." Read more

"Easy to use" Read more

78 customers mention40 positive38 negative

Customers are mixed about the performance of the auto part. Some mention that the engine seems to be performing better, while others say it didn't work for them.

"...It did the trick. I put it in my other cars and I believe it helped them run better. I would purchase again." Read more

"...For me it was six months ago and the product did not work for me." Read more

"...But the cataclean itself works wonders" Read more

"...ZERO change in how it ran and did not clean out the cat converter unit. Still have the dreaded P04200 code reading...." Read more

39 customers mention22 positive17 negative

Customers are mixed about the quality of the auto part. Some mention it's a great product with no complaints at all, while others say it'll waste your money.

"...This stuff is amazing." Read more

"...The product is blather, not substance." Read more

"Great stuff! No P0420 errors so far two months after adding a pint to a half tank in my 2012 Pilot EX. Will update my review if there are changes." Read more

"...To me it was over priced, waste of money.Would not recommend to use at all." Read more

36 customers mention7 positive29 negative

Customers are dissatisfied with the check engine light. They mention that the light comes back on even when cleared. Some customers also say that the product didn't clear the light.

"...Did nothing to clean it as the light continued to light up. New sensor is on order. Might work for some but not in my two cases...." Read more

"Can't really say whether or not it actually works, check engine light is still on...." Read more

"...Nothing happened for a couple days, then the check engine light went out. A week later the check engine light came back on...." Read more

"...Note: most check engine lights go off after many miles of driving. A Quick way is to clear the code after the long drive...." Read more

6 customers mention0 positive6 negative

Customers are dissatisfied with the catalytic converter. They mention that the engine light reports a failing catalyser, the converter gets clogged, and it's starting to go bad.

"...he says how is it running,great he said looks like the cat converter is starting to go bad,so I look online,kinda heard a rattling ist 5 min could..." Read more

"...It's very possible that it works but most likely the catalytic would have to have recently failed...." Read more

"...That is no good idea since the catalytic converter gets clogged. This leads to all kind of problems especially with the smog test ( if needed)...." Read more

"...bit when the check engine light came on .. guess out catalytic converter is too far gone" Read more

5 customers mention0 positive5 negative

Customers are dissatisfied with the product's ability to repair damaged cats. They mention that it will not fix a broken cat, and that it didn't clear the code.

"...Stopped oil leaks but this fluid could not recover the cats even temporarily. Used while container over a few weeks time." Read more

"...The only reason it didn't clear because my cats are really damaged and need to be replaced. I waited too long to but this stuff...." Read more

"The bank 1 of cat is no longer good that it would trigger the chk eng lt and run rough...." Read more

"The product works well and did no damage. However it will not fix a broken cat, i.e. one that is rattling. Use it early and save expensive repairs." Read more

Shocked this works
5 Stars
Shocked this works
Had the dreaded P420 code and I ran lots of diagnostics trying to figure out the problem. Replaced an O2 sensor and the whole 9 yards. I figured it would give this a shot before taking it in to spend hundreds or even over a thousand to diagnose and / or fix the catalytic convertor. I was highly, very, extremely skeptical that this would work. All be darned if it didn't clear the permanent code. I used this once on a 1/4 tank of gas like it says and drive around 50 miles and the code was still there. My wife drove it another roughly 50 miles and when I checked it again. The code was gone. Now, truth be told, it may have been cleared after the first 60bmiles or so but 100 miles definitely cleared it. It says to drive 15 minutes after use but if it doesn't work right away, drivebit around for awhile. Outstanding product.Update: the CEL came back on after about a week like others have complained about. I did a second round, drove 30 miles before filling up. Has not come back on and I've put over 600 miles on. Will update again if needed.
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Top reviews from the United States

David Leaton
5.0 out of 5 stars Cataclean 120018CAT CATACLEAN- GAS 3L FUEL/EXHAUST SYSTEM
Reviewed in the United States on May 5, 2024
Verified Purchase
Best Value for Cataclean is the 3L Option. it recommends 1L for 10 gallons.
I bought an long oil fill funnel and didn't waste a drop. I saw results with
1L in the first 10 Gallons of Gasoline. Cleans Catalyic Coverter, fuel injectors
and O2 sensors.
Helpful
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Boyd
5.0 out of 5 stars Cleared light, improved response.
Reviewed in the United States on April 24, 2024
Verified Purchase
2013 f150 5.0 had cat converter code…$500 for new cat, nope. $20 for one treatment, ok. Beat on it for 20 min, light gone. Miracle juice.😉👍
Helpful
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Myerkes
4.0 out of 5 stars Worth it
Reviewed in the United States on December 2, 2023
Verified Purchase
Definitely worth buying this and refilling the 16 oz containers. My only gripe is the container is flimsy so I always lose a little bit every time I fill a 16 oz container. But the cataclean itself works wonders
3 people found this helpful
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Jimiriquoi
3.0 out of 5 stars Didn't work for me
Reviewed in the United States on May 1, 2024
Verified Purchase
2003 Rav 4 had valve seal leaks for some time and allowed oil vapor and smoke to contaminate the cats. Stopped oil leaks but this fluid could not recover the cats even temporarily. Used while container over a few weeks time.
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john w.
1.0 out of 5 stars Save your money for a new cat.
Reviewed in the United States on May 26, 2020
Verified Purchase
Most anything sold to correct a problem by pouring into gas tank, crankcase, or transmission is snake oil. I have known this for years, and am embarrassed to admit that I ignored my own advice and bought this stuff. The time for the p0420 code to reappear after clearing it did not change....if it had even taken a bit longer, I would have just not written a review, but on two cars that both need catalytic converters, no noticeable difference. Yup.
Some other thoughts...this contains xylene, propanol, acetone, hydrotreated petroleum distillate. (From MSDS sheet). All are flammable. They are atomized and burned in the combustion chamber, so only the products of combustion pass through the cat. That is, almost all co2 and h2o. The cat took forever to fail, right? 80, 100, or 200 thousand miles. This one liter of magic liquid in your 1/3 tank of gas will be burned and gone in 100-150 miles. Highly diluted when you fill up before running out of gas. Changes happen to your cat slowly. An example: I work on planes, and occasionally get free gas after draining for maintenance. I ran 80 gallons of this free avgas (highly leaded, bad for cat and o2 sensor) through my 94 toyota truck. ( my reasoning being that 80 gal of gas is worth more than the o2 sensor, I’ll just replace it after it fails. Crappy old truck.) I expected an o2 sensor failure, but It didn’t. 80 gallons is over 300 liters. This 1 liter of clean burning stuff isn’t likely to do squat. The “hydrotreating” of the petroleum distillate is probably to remove sulfur compounds that came from the crude oil that the distillate came from. Meaning only that the cat cleaning liquid doesn’t have much sulfur in it that will further degrade your already failing cat. In other words, at least the wonder cleaner doesn’t make your item dirtier.
I think sales of these products depends largely on an attractive label, carefully worded to sound intelligent without meaning anything. Marketed to a hopeful (desperate?) clientele. Think weight loss products, politicians, and miracle spring water. The product is blather, not substance.
8 people found this helpful
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my7sevenangels
5.0 out of 5 stars Helped get my car through emissions testing.
Reviewed in the United States on April 5, 2024
Verified Purchase
I bought it mainly to get my car through emissions testing. It did the trick. I put it in my other cars and I believe it helped them run better. I would purchase again.
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wayne clayville
5.0 out of 5 stars I wood recommend using 91 octane gas,,,much better for exaust system. Burns cleaner
Reviewed in the United States on February 29, 2024
Verified Purchase
My engine lite came on and my mechanic detected catalytic converter going bad. I bought a pint of cataclean and added to my gas tank. I drove the car approx. 25 miles on freeway . Had the mechanic turn off the engine lite and it passed smog test and also the lite never came back on. My car has 236,000 miles on it. I recommend a pint every 3 to 6 months. My mechanic stocks cataclean now and solves a lot of exhaust problems with cataclean. This stuff is amazing.
2 people found this helpful
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