I’m not sure which product you’re referring to, but if your vehicle is routinely running rich, then there’s going to be physical damage to the catalytic converter that no amount fuel additive can combat. That’s why your catalytic converter is going out after just 10,000 miles when it should last the life of the car. The damage likely stems from minute amounts of unburned gasoline or hydrocarbons (“HCs” in your emissions report) and can also happen with old or bad spark plugs, bad injectors, dirty combustion chambers, etc. In such cases, the cat just gets too hot and starts physically breaking apart little by little. If that happens, the component at some point will simply have to be replaced. Under normal conditions, catalytic converters are “self-cleaning” and should outlive the car. If the “guts” are physically intact and functional and there’s just a little build up on the catalysts, then running a good fuel system cleaner and making sure the engine is properly tuned can help. This idealizes or “fixes” the combustion chamber products (CO2, O2, and N2 only) and allows the catalytic converter to start burning or “shaking off” the deposits and becoming active again. Our recommendation for trying to salvage your catalytic converter is two-fold. We suggest buying a can of our strongest gasoline fuel additive, B-12 Chemtool Total Fuel System Clean-Up (part #2616) and run it at 1 oz/gal. This will help fuel lines, fuel injectors, and intake valves (in non-direct-injection motors). After running out that tank in its entirety and refueling with fresh, quality gasoline, warm up the car and run our Total Combustion System Cleaner (part #2610). Once you’ve used all the combustion chamber cleaner, that will complete the cleaning process of the fuel system, fuel injectors, intake valves, and combustion chamber. At that point, you’ll want to start driving the car, preferably on the highway. Initially, you’ll see white-smoke-laden exhaust. This is good because deposits being cast off. If you drive for at least 15 minutes (and preferably about 30 minutes), you’ll really start burning off any deposits that have started to foul the catalysts. This is only a “fix,” though, if your engine is functioning properly. If not, you’ll start forming deposits in the combustion chambers again and further damaging the catalytic converter due to the passage of unburned fuel. Thanks for your interest in our products. Good luck!

The reason why your getting a catlytic effiency code is because your running rich. You sooting up the cat. If you dont fix your rich problem you will continue to go through cats often. The code your refering to is know as code: P0420 on most vehicles. What you can do to clean the cat is go to walmart and buy some laquare thinner and pour a gallon of it in your gas tank with a half gallon of gas and go drive it to burn it off. Or if you scared to do that u can just take the cat off and soak the whole thing in a bucket of laundry detergent and water for a day or two and let it break up all the crap in it.