Dura Lube Severe Catalytic and Exhaust Treatment | 16 oz., 6-Pack

Easy to use. Seems to help clear my engine code, may be a coincidence but it seems to help. Much simpler to use than replacing the catalytic converter on my 220k mile car

This was added to a car that's around 12 years old that had the check engine light come on periodically. It was taken in to get an inspection and failed due to a fail on the catalytic converter. The estimate for the repair was about $2500 because the catalytic converter is attached to the exhaust manifold and the labor to get it all taken apart and put back together is substantial. The car wasn't really worth the repair given the mileage on it, but we weren't ready to buy a new car just yet. We decided to roll try this out to see if we could pass emissions one last time and have more time to shop for a new car. It was easy enough to use... add it to the gas at the next fill up and drive. It took a few days to get a little past the halfway mark before the check engine light went out. We took it in, it passed inspection, and we got the sticker. The light came back on a couple of days later, but turns off for about 30-60 miles every so often. We didn't notice any other benefits... performance and mileage were about the same as before. This may work as a preventative for some people, but we were long past that point. This isn't going to fix a car's catalytic coverter, but it'll buy you some time before you get a repair or get a new car and sometimes that's all you need!

I give few product reviews because most of the time they don't work. So, when I purchase I pray! Well, I did not pray this time but the product worked. Wow! Therefore, I can say with all honesty...this product cleared my check engine light. Here is what I did: First, do not clear the check engine light with a scanner. If the light is showing in your dash, then OK (leave it). Next, make sure you only have around a quarter tank of gas. Now, set your Trip A meter to zero (or calculate 25 miles by adding it to your current odometer reading). Next, place the entire bottle of the product into your gas tank. Start the engine and drive around 25 miles (mine worked at 21 miles). Note: you don't have to drive right away. You can drive the 25 miles or a period of time (mine was two days). After driving for 25 miles you should see the check engine light go out. Good luck! Update (1): check engine light came back. update (2): Found the problem. The gasket near the oxygen sensor (bank 1 down stream) had a leak. Gasket replaced and check engine light went out. So, check for exhaust leaks before making a purchase.

I don't want just to say it works without giving details, but it could be hard as there is no objective data or measurement to present. I will try to tell the long story short, and you can see how it is working. 2005 Honda Pilot, over 190k miles. Late 2019, the check engine light came on for the first time while I am driving and it went off before I could brought it to the shop to check. I mentioned it to the mechanic when brought my car to do maintenance, he checked it and said the it was catalytic converter and asked me to just pay attention, and probably no need to do any check or fix soon. The light came back on and then off maybe a handful of times, but remained off for the most. The car passed the emission inspection at the end of 2019 without any problem. 2020, due to Covid and work from home for over nine months out of the year, I did not drive the car much the entire year, probably about 300 miles a month(used to be 1.3k - 1.5k miles a month). The check engine light came on and off became worse and worse. I bought a code reader and checked it, it is P420. I kept on discussing with my mechanic he kept on saying it probably not worth the effort and money to diagnose and fix, and if it can pass the emission, it should be okay. By the end of the year, I was driving with the check engine light on around 80 to 90% of the time. The light did go off once a while but it would come back on shortly. The car passed the emission test again in December. While discussing about the check engine light with the gentleman who ran the emission test, he told me that there might be some cleaner I can use to see if it could correct the issue. That lead me to buy this. During the first bottle with about 16 gallon of gas, the check engine light went off after about 50 miles of driving, stayed off for about 80 miles, then came on again and stayed on for another 60 or 70 miles, then off and on again right around time the tank was near empty (240 miles). I got another tank of gas without the cleaner, about 30 miles later, the light went off, and now I have about 150 miles with this tank of gas it has stayed off. My conclusion is that it is very clear, this cleaner works. I plan to get a few more bottles and continue to use it until the check engine light stays off for good.

I purchased this product based on what it said it could do and not only did it do nothing for my catalytic converter issue, my second catalytic converter now needs to be replaced along with the PCV valve. Needless to say this product is causing me to now have to purchase a new car because the amount required to fix my car is an excess of $9000. If you are smart, do not purchase and use this product in your car unless you want to have to purchase a new one.

After using one tank of petrol, my engine light is still on. Does seem to be effective.

Still the code is appearing P0420, no use

Check engine light still there but the car is smoother

Fix the knocking on my car for a while..

En una Outlander 2007 empezo a marcar un codigo, no recuerdo el numero pero era relacionado a "Catalitic Converter Upper Threshold Bank 2" y estaba a punto de cambiarlo $$$ :(, pero decidí probar con este producto, al principio no cambio nada, pero a la 2da semana despues de vaciar el tanque y rellenarlo, el codigo desaparecio y ya va mas de 2 meses que no marca ningun problema, así que debes de tener paciencia para que haga efecto y limpie perfectamente tu convertidor. En mi caso la camioneta tiene 3, el que va en el escape y 1 a cada salida de las cabezas de motor en mi caso un V6 3.0L con 2 cabezas. Genial y super recomendado. Pero repito, hay que tener paciencia y no desesperar por ver el testigo de motor ahi encendido. Pense en resetearlo yo pero ha lo habia intentado anteriormente y volvia aparecer, antes de probar con este producto de DuraLube.