Cataclean Fuel & Exhaust System Cleaner, Automotive Additive, Catalytic Converter Restorer, 16 oz

My car has a finicky catalytic converter. My mechanic recommended this to help get me through inspection. For me, this and a quality air filter eliminated my error codes. Happy with the product

Check engine light was on. The code indicated something with the catalytic converter. This was recommended for treatment rather than shell out $3k for a new one. The instructions say to wait until car has fourth a tank then put it in. Took about a fifteen minute drive and left overnight. Next morning, check engine light was off and has yet to return. Relief!!!

we are firm believers in using this and have tried other brands and not had any luck with getting better performance like we do with this brand. It is a pricey product but well worth it and honestly its just something that should be done amd used as preventive maintenance. We use this in all of our vehicles and can tell a difference immediately. we pour the bottle in when we are about a little less than a quarter of a tank. Weve never had issues with smoke but have heard other family that used it when they noticed some smoke from the tailpipe and it cleared it up. Reliability and consistency is something that we rely on when it comes to products we use in our vehicles and this formula is tried and true and dependable as it comes.

2012 Accord V6 with 165K miles. Started getting the P0430 code (catalytic converter efficiency error). I didn't expect much but thought I would give this a try before replacing the converter. Ran from 1/4 tank to near empty. Immediately started noticing more HP. Really pressed the gas pedal down whenever safe at stop lights/signs to help blow it out. To my amazement, ~50 miles, MIL P0430 dissapeared and check engine light went off. This stuff worked for me and I am very happy with the results!

Seems to work so far. It will take awhile to actually see a difference. Within 36 miles already notice to see a difference in the hesitation. Time will tell about the catalytic converter. From videos I've watched this is the number 2 behind BG product which is only available as a service by a garage. So we'll see after we read the emmision levels after 2nd tank of gas

I've NEVER left a review and believe very few I read, but 2004 Honda accord 173k miles and this stuff got the check engine light to go off the same day I used it. I followed the directions on the bottle and to my suprise, it actually worked.

garbage, did nothing. now my car hesitates and feels like it's ready to stall when driving around town and driving on whindy roads.. waste of $27 and a lot of time driving

Used scope camera to confirm, cat not clean after using product. Did not help with dash light and code.

Welp, it worked! I have an older car (2015, 125000 miles) and I needed to pass my emissions test. After the p420 or whatever code came up, I decided to try this. Everyone's reviews say it was pretty instantaneous for them, but it wasn't the case for me. I was losing hope, but to my surprise, it worked. It took 8 days and 250 miles for my light to turn off- and I drove it straight to emissions and passed. Worth a try for sure!

This has worked better than anticipated with a 25 year-old vehicle that was just starting to throw catalytic codes / check-engine lights after over 250K miles. The first application cleared the codes and the vehicle passed smog. After 7 months the catalytic code/check light appeared again. A 2nd application of Cataclean again removed the catalytic code / engine light, although it took driving a further 2-3 tanks of gas to do so.