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

I have used it twice on my 25 year old car and it helped my car pass my state's emissions tests. Before the treatment, my car had a blast of white smoke coming out of the muffler and once I started using it the smoke was virtually gone.

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.

Works .pour 1 bottle to a quarter tank.. drive on freeway. Then fill up tank and drive about 150 to 200 highway miles.. keeps the code away for months.. add 91 octane to keep it off

2.5-STARS This is an UPDATE. I forgot to mention added data. This review is for a diesel truck. This product can be used in both gas and diesel (label instructions). Maybe it works better on gasoline engines. I'm going to bump up 1 STAR from 2-star to 3 star. Initially I got low miles between regens using this product at 282 miles. But I still had 1/2 tank of diesel and Dura Lube in and I was pulling a heavy trailer for last half tank and last 10 grams of soot. I was able to drive 550 miles between next regen interval. That is a 166 mile increase from baseline, a 268 mile increase from first test of this product (282 miles), and a 17 mile increase from Liqui Moly Super Diesel Additive. Just be aware that I was towing with the second results. Towing increases EGTs and helps with longer regen intervals (at least in my case). But then the next refill after with no additive dropped back down to 308 miles, so no long lasting affects. In the end, I probably wouldn't recommend the Dura Lube products, but its your vehicle and money. I would use Cataclean for Catalytic cleaning and Liqui Moly DPF protector and Archoil AR6500 for DPF cleaning. This is a review on Dura Lube Severe Catalytic and Exhaust Treatment. I am giving this product a 2.5/3-star review. I used two, 16 ounce bottles mixed with 34 gallons of fuel. No check engine lights came on. Vehicle showed no adverse affects from additive. Regen mileage interval with NO additives was 384 miles after receiving vehicle from repair shop and vehicle working properly. This product increased regen frequency (not good) from previous additive and increased frequency (not good) from baseline, which suggests that it’s worse than no additive at all. Soot seemed to accumulate faster with this product. This product had a decrease in miles between regen intervals than previous additive (Liqui Moly Super Diesel Additive), and a decrease in mileage from baseline figure. As far as mileage goes, vehicle lost about 0.9mpg average on uphill route(driven 4 times), but remained about the same on downhill route. I did not get any engine error codes while using this product. Mileage between regens decreased from 384 miles (baseline) to 282 miles (-102 mile increase)(bad). The product that I used previously was Liqui Moly Super Diesel Additive. Dura Lube Severe Catalytic and Exhaust Treatment decreased interval miles from previous additive, 533 miles, to 282 miles (-251 miles)(bad) This product did not do my DPF any good. Maybe it cleaned my catalytic and other exhaust components. But soot seemed to accumulate faster with this product in the DPF. When using any DPF cleaner or additive, I would try to incorporate a regen cycle during use and go on longer drives on highway or freeway to increase the EGTs to burn off the soot. Driving Notes: 33.5 miles driven during regeneration cycles Soot down to 0 grams (this is good) EGTs = 598F temperature, normal highway driving (higher temp) EGTs = 727F temperature during regeneration cycle (higher temp) Injection quantity at idle at baseline=9mm Injection quantity at idle after Dura Lube Severe Catalytic and Exhaust Treatment=8mm #1 #2 #3 #4 #5 #6 #7 #8 Injector balance at baseline: -0.5, 0.1, -0.2, 0.9, -0.6, -0.1, 0.0, 0.4 Injector balance after additive: -0.7, 0.1, -0.2, 0.5, -0.3, 0.2, 0.3, 0.2 Less fuel being used at idle. Small decrease in mileage from baseline on uphill route: Increase in regeneration intervals: (not good) From baseline: decreased distance between intervals -102 miles (not good) From previous additive (Liqui Moly Super Diesel Additive):decrease in distance between intervals -251 miles (not good) Injector balance seemed about the same. My review is based on product efficiency, any damages to vehicle, check engine lights turning on or off, ability to clear engine codes (if my vehicle has any check engine lights), increase or decrease in mileage, and increase or decrease in regeneration mileage intervals. I will not use price as a factor. You will have determine if product is worth the cost. These products may or may not save you costly repairs or replacement. I cannot determine if these products can or will damage your vehicle. My vehicle has no check engine light or error codes. My vehicle is in good working order with no current issues during this review. My vehicle has over 200,000 miles. This is a stock vehicle, with a stock (OEM) factory tune installed. Just prior to this test, my truck was not performing a regen cycle. Repairs were done which included a new 9th injector, new DPF pressure monitor. The pressure monitor measures pressure before and after the DPF filter. The difference in pressure allow computer to estimate how much soot has accumulated in the DPF filter. A force regen was also performed on my vehicle and a passive regen performed before I received my vehicle from repair shop. Vehicle is performing as it should. Test drive is relatively the same and consistent. 49.5 miles one way, with a drive time of about 56 minutes. There is a gradual 1129 foot elevation gain one way and 1129 elevation loss the opposite way. There is some surface street driving, some freeway driving, and most of drive is highway. Hope this review helps. I will be writing more reviews on other diesel additives. I have some data from other additives for comparison listed below. Most products seemed to help and a couple seemed to worsened DPF performance during testing. You should not compare the towing data for comparison. I have just added it to show that towing will change data. Towing will increase exhaust gas temperatures and should make the DPF more effective. My regen mileage intervals increased, decreasing regen frequency, while towing. There are many factors that affect the DPF performance. The factors that I noticed (on my vehicle) are outside temperature, humidity, vehicle speed or stop and go traffic(big factor), and EGTs. Lower temperatures decreased DPF performance. Higher humidity decreased DPF performance. Higher outside temperatures and lower humidity seem to increase DPF performance. Higher EGTs such as towing increased DPF performance. Longer driving distance seems helps the DPF filter as optimal temperatures are reached. It seems like soot accumulates faster when the engine and DPF filter are not warm/hot enough, and faster within the first 10-15 miles of travel. If you are only making short trips then the DPF will fill up faster and regens will be more frequent. Regeneration Interval Mileage Comparison of Different Additives: baseline (no additive), 384 miles between regeneration intervals Archoil AR6200 Fuel Treatment, 391 miles between regeneration intervals,+7 mile increase from baseline, +7 mile increase from previous additive(none, baseline) Wynn’s DPF Regenerator, 462miles between regeneration intervals, +78 mile increase from baseline, +71 mile increase from previous additive Seafoam (high dose), 504 miles between regeneration intervals, +120 mile increase from baseline, +42 mile increase from previous additive Nitrox Clean Cat Diesel, 324 miles between regeneration intervals, -60 mile decrease from baseline, -180 mile decrease from previous additive Archoil AR6500 pulling trailer in hot weather (not same comparison) , 1075 miles between regeneration intervals, +691 mile increase from baseline, +751 mile increase from previous additive Nitrox Clean Cat Diesel 2nd try, 402 miles between regeneration intervals, +18 mile increase from baseline, +78 mile increase from previous additive(Nitrox Clean Cat Diesel) Liqui Moly Diesel Purge, 265 miles between regeneration intervals, -119 mile decrease from baseline, -137 mile decrease from previous additive Wynn’s Turbo Cleaner, 298 miles between regeneration intervals, -86 mile decrease from baseline, +33 mile increase from previous additive Rislone Hy-Per Diesel, 323 miles between regeneration intervals, -61 mile decrease from baseline, +25 mile increase from previous additive Rislone DPF Clean, 323 miles between regeneration intervals, -61 mile decrease from baseline, 0 mile difference from previous additive Archoil AR6500 pulling trailer in hot weather one way, cooler temps coming back(2nd trip, different route) (not same comparison), 680 miles between regeneration intervals, +296 mile increase from baseline, +357 mile increase from previous additive Cataclean, 414 miles between regeneration interval, +30 increase from baseline, +26 mile increase from previous additive Archoil AR6500 Diesel Treatment, 564 miles between regeneration interval, +180 mile increase from baseline, +150 mile increase from previous additive Archoil AR6400-D Diesel Fuel System Cleaner, 462 miles between regeneration interval, +78 mile increase from baseline, -102 mile decrease from previous additive Archoil AR6500. Liqui Moly Pro-Line Diesel Cleaner, 444 miles between regeneration interval, +60 mile increase from baseline, -18 mile decrease from previous additive Archoil AR6400-D Liqui Moly Diesel Particulate Filter Protector, 625 miles between regeneration interval, +241 mile increase from baseline, +181 increase from previous additive Liqui Moly Pro-Line Diesel Cleaner Liqui Moly Super Diesel Additive, 533 miles between regeneration interval, +149 mile increase from baseline, -92 mile decrease from previous additive Liqui Moly Diesel Particulate Filter Protector Dura Lube Severe Catalytic and Exhaust Treatment, 282 miles between regeneration interval, -102 mile decrease from baseline, -251 mile decrease from previous additive Liqui Moly Super Diesel Additive AC Delco Fuel System Treatment Plus-Diesel, 425 miles between regeneration interval, +41 mile increase from baseline, +143 mile increase from previous additive Dura Lube Severe Catalytic and Exhaust Treatment Dura Lube Diesel DPF and Catalytic Treatment, 360 miles between regeneration interval, -24 mile decrease from baseline, -65 mile decrease from previous additive AC Delco Fuel System Treatment Plus-Diesel Star Review Legend 1 star: Made check engine light turn on or trigger error code(s) 2 star: Causes no check engine warnings and no engine error codes. Mileage worsened or DPF regeneration intervals decreased in mileage. DPF regeneration process worsened. 3 star: gained less than 50 miles in regen mileage interval (from baseline or previous additive), or slight increase in mpg. 4 star: gained more than 50, but less than 100 miles in regen mileage interval (from baseline or previous additive), or +2 mpg increase 5 star: gained more than 100 miles in regen mileage interval (from baseline or previous additive), or +3 mpg increase.

... pleasant surprise! My daily driver, 2004 Prius, 207k on the clock, two day old check engine light, critical getting on it, nipping it in the bud, ASAP. Never-never-never drive, more than 100 miles, on a check engine light. Poured out the entire bottle on a half tank, for the 100 mile return trip home, combined nonstop freeway and canyon driving, three thousand foot elevation change. Check engine light persisted. Adopted a wait and see attitude, resisted temptation to top off, continued the fuel burn. Before its fuel gauge could reach 3/10ths tank remaining? SURPRISE! No more check engine light. If you can believe that? Intend backing up my result, with a second treatment, another bottle on a half tank for the daily driver, soon doing likewise, on my vintage two-seater, and my 4WD -

My engine light keep coming reset it would come back on but this product I use Saturday evening and Sunday engine light went off this is a good product

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

N/A

Still the code is appearing P0420, no use

Check engine light still there but the car is smoother

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.