Cataclean Fuel & Exhaust System Cleaner, Automotive Additive, Catalytic Converter Restorer, 3 Liter Jug - Treats up to 30 Gal of Fuel

Keeps the notorious P0420 code at bay that's notorious on the Volvo 3.0L T6. Much cheaper to buy this than the individual bottles, but you do have to deal with measuring these out, which is admittedly a pain. But when you're having to do these on two high mileage Volvos, then it's a no-brainer!

It's a good deal works for us and you can do multiple treatments with this size

we live how this helps alleviate some funny exhaust smells. Our vehicles do seem to run smoother after a treatment (2006, 2013)

Extending the catalytic converter life span. Very valuable specially with prices nowadays

worked very well. will purchase again

I have used product before and the price was right.

Keeps engine running smoothly. Extends the life of the engine. Great product. Fair price.

Tried chevron Techron to get rid of po420 and failed to get rid of code. Cataclean worked for me. I added 32oz to less than a quarter of a tank of gas and drove car on highway for 20 minutes. I later drove the car until the low fuel light came on and then filled tank with gas and reset check engine light which so far has not come back on with over 200 miles of driving a 2007 Hyundai Santa Fe with 155k miles.

It works! I watched YouTube videos. Some said it worked, others said it did not. I took a chance, and ordered a big bottle in case I had to use it for several applications. Heck, it is cheaper than getting a new catalytic converter, and cheap enough to take the risk. It took two applications, but both my cats are now reading voltage exactly as you expect if working properly and the infamous P0430 is gone! I just wish I had a YouTube account and could have recorded the data pre and post application. I cannot promise it will work on your cat, but it did work on mine, with 100,000 miles on the cat and the CEL having been on for more than 10,000 miles and 5 months. Have I said it already? This stuff works!!

This product was purchased to see if it would help my car's fuel system. This product takes time to work from what I understand. I am not sure of the results yet. Regarding the price, I found another seller that had the same product at a few dollars more but offered free shipping so the price was about the same. I went ahead and ordered from Walmart regardless because I had Walmart Cash available which would even out the price. If I had not had the Walmart Cash available, I would have ordered the product from the other seller.