2X Cans Catalytic Converter Cleaner, Oxygen sensor cleaner, pass emissions, SMOG, fuel additive, combustion chamber cleaner

Excellent product. I used it on my 1997 toyota Tercel and boy it completely changed the idle on the car. It really cleaned out the exhaust since now I feel a constant pressure when Input my hand on the end tip of the muffler. The car runs great now. I did have to use both bottles 2 months apart from each full tank. The 2nd time I used it it just finished open it up and it really made a difference.

Was ready to take my car in and read everything online. I decided to give this a try on my Nissan. It was running rough. Now, 5,000 miles later, it is still running smooth. I was shocked that something actually worked.

Did not work for me. To be fair, it’s possible that my cat has cracked.

I had an O2 sensor check engine light code show up on my 2008 Chevy Colorado. Now this sensor wasn't over 2 years old. Anyway, I put a bottle of this in my gas and after a tank, the check engine light went off. I am still impressed.

This did NOT work at all. They shouldn't advertise that it is to help emissions. It's FALSE advertising. They are LYING.I contacted them and let them know that it didn't work. Do you know what they said? "Your catalytic converter is crack, melted, or damaged." My catalytic converter is NOT damaged at all what so ever. That's just their cop-out for everyone whose P0420 code did not get fixed after using this. Bull ROAR. Absolutely disgusted and disappointed with the company. Don't even waste your money on this. Do not even, it's a scam and a grift. Brilliant snake soil salesmen this company is.You have been warned.

It helped with gas mileage but not the check engine light. I replaced the purge valve on 2008 Pontiac Vibe about 2 weeks before I used this product and there was no change in mpg so I would say this works if you're looking for better mileage. The next thing I'll replace will be the O2 sensors and last (if needed) will be the catalytic converter to clear the check engine light.

Worked to get my Catalytic Converter engine warning light off for annual inspection. Works with less than 1/4 tank of gas after driven 15 to 20 highway speed miles using both cans. Note: your engine light will probably reappear once you fill up the tank with gas and drive for a while. This doesn't fix the converter problem, it just masks it for a while. None of these liquids can fix a converter that is really bad. They do clean the intake filter for a while.

I've had the error code P0420 in my car for a while now. I've tried Cataclean. I've tried K&N Performance+ Fuel System Cleaner. I've tried other fuel system cleaners such as Chevron's. None has worked and my P0420 error code persisted. My mechanic said the catalytic converter might need to be replaced or the O2 sensors are damaged by gunk. I'm not going to spend around $3,000 for a new catalytic converter. Another option the mechanic said was to buy a catalytic converter cleaner. I said it's worth a shot. Went to Amazon and found this item by MotorPower. This must be new because I haven't seen this before. I said what the heck I'll give it a shot. So, I waited until my gas tank was 1/4 full. Then, I added a can of this to the tank. Drove around for a bit and revved the engine up a bit as well. Filled the gas tank with top-tier gas 93 octane. P0420 was still lit. It wasn't looking good, but I figured I'd only lose $30. Then, suddenly the P0420 check engine light error went away last week. I thought it will probably come back. However, it has been a week now and no P0420 error! Whoa, this stuff actually works for my car. Amazing. Saved me thousands of dollars. I will probably treat my car with this stuff more often. I recommend this to anyone with the P0420 O2 sensor error code. Give it a shot. It wouldn't hurt.