Dura Lube Catalytic & Exhaust System Treatment Emissions Additive Automotive Converter Cleaner 16oz
Dura Lube Catalytic & Exhaust System Treatment Emissions Additive Automotive Converter Cleaner 16oz
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Dura Lube Catalytic & Exhaust System Treatment Emissions Additive Automotive Converter Cleaner 16oz

Key item features

  • Routine Maintenance: Use before replacing your catalytic converter and routinely to maintain catalytic functions.
  • Emissions Control: Helps pass emissions control tests by cleaning the system and lowering tailpipe emissions.
  • Warning Light Solution: Use when the warning light is activated (OBD II Code PO420); consistent use keeps the warning light off.
  • System Protection: Protects the catalytic system from oil poisons, extending its life and reducing phosphorus & zinc retention levels.
  • Fuel Efficiency: Reduces fuel system deposits that affect pre-combustion, improving fuel efficiency.
  • Versatile Use: Safe for all fuel types including gasoline, flex-fuel, ethanol, diesel, and suitable for all vehicle ages.
  • Vehicle Compatibility: Works great in compact cars, sedans, SUVs, vans, light pickup trucks, and heavy-duty vehicles.
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Current price is $19.54$1.22/fl oz
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Customer ratings & reviews

4.2 out of 5 stars
stars766 ratings352 reviews
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Reviews summary

Pros

  • : Operates with a reduced sound.
  • : Clear instructions make it easy to use.
  • : Enhances miles per gallon performance.
  • : Directions are simple and understandable.

Neutral

  • : Can be smooth and responsive, but may be inconsistent.
  • : Offers reasonable value for some, but pricey for others.
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Showing 1-3 of 352 reviews

Oct 7, 2025
anonymous
Walmart Associate
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Multipack quantity: 1
5 out of 5 stars review

Verified Purchase

Had a catalytic converter code which turned on my check engine light and my mechanic recommended me to use this before paying to replace and after like 3 days the check engine light turned off and was able to take it to emissions. Definitely recommend to use before replacing your catalytic converter.

Helpful?5WVQTFF9SVD4736363599
Dec 26, 2025
Philip
Item details
Multipack quantity: 1
5 out of 5 stars review

Verified Purchase

Cleans the entire fuel system including O2 sensors and the catalytic converters. Good product if you use it BEFORE you have problems. Probably won't clean a heavily dirty converter. I use it once a year on both my high mileage vehicles and have never had any converter problems.

Helpful?5WVQTFF9SVD4736363599
Nov 20, 2025
MEvans
Item details
Multipack quantity: 1
5 out of 5 stars review

Verified Purchase

Ive been using this for over 2 years and spent more money on this item than I'd like to admit. I have a 2017 Hyundai Elantra 2.0L. check engine light came on 2 years ago P0420. around 115,000 miles. I have used this every 3 months for the last 2 years. I have replaced my canister purge valve, O2 sensors, spark plugs and coils. I'm currently at 159,000 miles. The light still continues to come on from time to time and I just shut it off using my obd2. then I go and buy bottle and put it in and I'm good to go for a bit. I live in Pennsylvania and we have to get our car inspected every year. I've passed 2023, 24 %26 25 using this. After you put this in your full gas tank, your light will turn off on its own after driving a bit. I drive a lot on the turnpike and when my light is on, it puts me on edge which is why I shut mine off after checking to make sure it's still the same p0420 code. obviously in my case, it's not fixing the problem, just prolonging the inevitable. Replacing a catalytic converter can cost two grand So it's worth spending 20 bucks to try it out. Even if your light doesn't come on, it's still a good option for preventative care.

Helpful?5WVQTFF9SVD4736363599