10 Best Catalytic Converter Cleaner of 2026

Last updated on 04/04/2026
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1
9.9
Exceptional
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Cataclean Fuel & Exhaust System Cleaner – Pass Emissions Tests – Clear Check Engine Lights – Restores Catalytic Converters, DPF Filters and Cleans Fuel Systems, 16oz - Pack of 2 (120019)
Cataclean

Cataclean Fuel & Exhaust System Cleaner – Pass Emissions Tests – Clear Check Engine Lights – Restores Catalytic Converters, DPF Filters and Cleans Fuel Systems, 16oz - Pack of 2 (120019)

9% Off
Why we love it
  • Reduces hydrocarbon emissions significantly.
  • Restores engine performance effortlessly.
  • Clears check engine light codes.
Main Highlights
  • Pass Emissions Tests with Confidence: Cataclean is specifically formulated to reduce carbon build-up and clean vital components like catalytic converters, DPF filters and oxygen sensors, helping your vehicle meet stringent smog and emissions standards. Reduces hydrocarbon emissions on gas motors by up to 50%!
  • Enhance Fuel Economy and Performance: Cataclean cleans fuel injectors and cylinder heads, leading to improved fuel combustion, better mileage, and restored engine power.
  • Clear Check Engine Lights: By cleaning your car’s exhaust and fuel systems, Cataclean restores optimal performance and helps resolve common check engine light codes like P0420, P0430, P0171, P0174, P0300, and P0401, potentially saving you thousands on repairs.
  • Maintain Catalytic Converter Efficiency: Regular use of Cataclean helps prevent carbon accumulation in your catalytic converter, ensuring it operates efficiently and prolongs its lifespan. ​
  • Easy Application: Simply add Cataclean to your fuel tank as directed; no special tools or mechanical skills required, making it a convenient addition to your vehicle maintenance routine. Safe for use in gasoline, diesel and Hybrid engines. 50 state legal.
9.9
Exceptional
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Best Value
2
9.7
Exceptional
Dura Lube Severe Catalytic and Exhaust Treatment Cleaner Fuel Additive | 16 Fl oz, 2-Pack
DURA LUBE

Dura Lube Severe Catalytic and Exhaust Treatment Cleaner Fuel Additive | 16 Fl oz, 2-Pack

Why we love it
  • Boosts engine performance effectively.
  • Prevents costly catalytic converter replacements.
  • Enhances fuel economy for savings.
Main Highlights
  • PERFORMANCE. Catalytic converter cleaner and fuel additive that helps restore engine power, smooth acceleration, and overall system efficiency.
  • CHECK ENGINE. Helps address emissions-related issues that can trigger check engine light, reducing the need for costly catalytic converter replacement.
  • EMISSIONS. Cleans carbon buildup in catalytic converter, oxygen sensors, and exhaust to support cleaner emissions and improved performance.
  • FUEL SYSTEM. Works as a fuel injector cleaner to promote better combustion, improved throttle response, and increased fuel economy.
  • UNIVERSAL USE. 16 oz fuel treatment for all gasoline engines including cars, trucks, and SUVs; easy pour-in solution for maintenance or repair.
9.7
Exceptional
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3
9.5
Superb
Save 6%
Cataclean (120007-2PK) Fuel and Exhaust System Cleaner - 16 fl. oz., (Pack of 2)
Cataclean

Cataclean (120007-2PK) Fuel and Exhaust System Cleaner - 16 fl. oz., (Pack of 2)

6% Off
Why we love it
  • Lowers hydrocarbon emissions significantly.
  • Enhances fuel efficiency effectively.
  • Improves overall vehicle performance.
Main Highlights
  • Using Cataclean can lower your total hydrocarbon emissions by up to 50 percent
  • Reduces carbon build-up in catalytic converter, oxygen sensors, fuel injectors and cylinder heads which results in improved fuel efficiency
  • Improves overall vehicle performance-including drivability issues such as power reduction, hesitation, rough idle, hard starts and lost fuel economy
  • Safe for gasoline, diesel, hybrid and flex-fuel vehicles; does not alter fuel
  • Not for use in 2-stroke or oil/gas mix engines
9.5
Superb
Save 6%
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9.5
Superb
Save 8%
Cataclean Fuel & Exhaust System Cleaner – Pass Emissions Tests – Clear Check Engine Lights – Restores Catalytic Converters, DPF Filters and Cleans Fuel Systems, 16oz (120007)
Cataclean

Cataclean Fuel & Exhaust System Cleaner – Pass Emissions Tests – Clear Check Engine Lights – Restores Catalytic Converters, DPF Filters and Cleans Fuel Systems, 16oz (120007)

8% Off
Why we love it
  • Pass emissions tests effortlessly.
  • Boost fuel economy significantly.
  • Clear check engine lights quickly.
Main Highlights
  • Using Cataclean can lower your total hydrocarbon emissions by up to 50 percent
  • Reduces carbon build-up in catalytic converter, oxygen sensors, fuel injectors and cylinder heads which results in improved fuel efficiency
  • Improves overall vehicle performance-including driveability issues such as power reduction, hesitation, rough idle, hard starts and lost fuel economy
  • Safe for gasoline, diesel, hybrid and flex-fuel vehicles; does not alter fuel
  • Not for use in 2-stroke or oil / gas mix engines
9.5
Superb
Save 8%
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5
9.4
Superb
MotorPower Care Catalytic Converter Cleaner 2-Pack — Pass Smog & Emissions Test, Fix P0420/P0430 Check Engine Light | O2 Sensor & EGR Cleaner | Fuel Additive, 8.45 fl oz Each
MotorPower Care

MotorPower Care Catalytic Converter Cleaner 2-Pack — Pass Smog & Emissions Test, Fix P0420/P0430 Check Engine Light | O2 Sensor & EGR Cleaner | Fuel Additive, 8.45 fl oz Each

Why we love it
  • Cleans and protects catalytic converters.
  • No disassembly required, easy application.
  • Fixes codes P0420 and P0430.
Main Highlights
  • ✅ Restores Engine Performance
  • ✅ Compatible with Gasoline & Hybrid Vehicles
  • ⚠️ Ensure the catalytic converter is intact. This product is highly effective for cleaning but will not repair a cracked, broken, or melted catalytic converter.
9.4
Superb
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6
9.3
Superb
MotorPower Care DPF Foam Cleaner — Diesel Particulate Filter & Catalytic Converter Cleaner Spray | No Removal Needed | Cleans Soot & Carbon via O2 Sensor Port | German Technology
MotorPower Care

MotorPower Care DPF Foam Cleaner — Diesel Particulate Filter & Catalytic Converter Cleaner Spray | No Removal Needed | Cleans Soot & Carbon via O2 Sensor Port | German Technology

Why we love it
  • High-tech cleaning solution efficiency.
  • Easy application saves time.
  • Improves performance and fuel efficiency.
Main Highlights
  • PROFESSIONAL-GRADE DPF & CATALYTIC CONVERTER FOAM CLEANER — Trusted by thousands of diesel specialists. This German-engineered spray foam dissolves heavy soot and carbon buildup inside your DPF or catalytic converter without any disassembly.
  • NO REMOVAL REQUIRED — Clean through the O2 sensor or temperature sensor port using the included long-reach nozzle. Spray, soak 20-25 minutes, reinstall sensor, and drive. Saves $500-$2,000 vs. professional DPF cleaning services.
  • WORKS ON DIESEL, GAS & HYBRID VEHICLES — Unlike fuel additives that only work on mild buildup, this direct-spray foam penetrates and dissolves even severely clogged filters. Use on DPF filters, catalytic converters, and EGR valves.
  • RESTORE FULL ENGINE POWER & FUEL ECONOMY — A clogged DPF triggers constant regen cycles, kills fuel economy, and robs horsepower. Our foam cleaner restores flow, reduces regen frequency, and brings back the performance you're missing.
  • Use regularlPAIRS WITH DPF PURGE ADDITIVE (SKU 808) — After foam cleaning, maintain results by adding our DPF Purge fuel additive every 3,000 miles. This preventive maintenance combo keeps your DPF clean and avoids the $3,000-$8,000 DPF replacement cost.y MotorPower Care DPF Foam Cleaning to maintain a proper operating emission system.
9.3
Superb
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9.2
Superb
Save 22%
Rislone 4720 Cat Complete Fuel, Exhaust and Emissions System Cleaner,16.9 oz. | Cleans Catalytic Converter, Reduces Emissions & Saves Gas
Rislone

Rislone 4720 Cat Complete Fuel, Exhaust and Emissions System Cleaner,16.9 oz. | Cleans Catalytic Converter, Reduces Emissions & Saves Gas

22% Off
Why we love it
  • Increases power and performance.
  • Saves on repair costs.
  • Compatible with all engines.
Main Highlights
  • Increase power, performance, mileage and save gas: Cleans by not only the entire emissions and exhaust system, but the fuel system as well. Works with gasoline, ethanol and hybrid vehicles.
  • Save on expensive fuel system and emission control repairs: Regular use every 5,000 miles tunes-up the fuel, emissions and exhaust systems keeping them clean and preventing the CEL light from returning.
  • Will not void manufacturer’s new vehicle warranty: Specifically designed and safe to use on vehicles which have oxygen sensors and catalytic converters. Exceeds EPA compliance performance criteria.
  • Works on all fuel injected, direct injected, carbureted, turbo, GTDI, Ecotec and EcoBoost engines.
  • Clean fuel and exhaust systems reduce excess exhaust hydrocarbon, CO and NOX emissions and saves gas.
9.2
Superb
Save 22%
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8
9.0
Superb
Liquii Moly 8931 Catalytic-System Cleaner, Uncoloured - 2 PACK
Generic

Liquii Moly 8931 Catalytic-System Cleaner, Uncoloured - 2 PACK

Why we love it
  • Improves catalytic converter efficiency.
  • Removes impurities effectively.
  • Convenient 2-pack for savings.
Main Highlights
  • Product Details: This Catalytic-System Cleaner is designed to clean and remove sediments and impurities in the intake system and combustion chamber, ensuring optimal performance of the catalytic converter.
  • Package Size: The product comes in a 300 ml bottle, weighing approximately 0.299 kg with dimensions of 17.6 cm L x 5.0 cm W x 5.0 cm H.
  • Ingredients: The active ingredient is a special combination of additives formulated for cleaning and maintaining the catalytic system.
  • 2 PACK
9.0
Superb
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9
8.8
Excellent
OXICAT- Oxygen Sensor & Catalytic Converter Cleaner-Engine, Fuel & Exhaust- Pack of 2 FOR PREVENTIVE MAINTENANCE
AUTOPROFI

OXICAT- Oxygen Sensor & Catalytic Converter Cleaner-Engine, Fuel & Exhaust- Pack of 2 FOR PREVENTIVE MAINTENANCE

Why we love it
  • Effective for all vehicles.
  • Cleans exhaust system efficiently.
  • TUV certified for reliability.
Main Highlights
  • A key step in your PREVENTIVE MAINTENANCE ROUTINE. Safe and effective for all gasoline- and diesel-fuel vehicles
  • Engineered to clean the entire exhaust system WITH REGULAR USE.
  • OXICAT is activated when the catalytic converter reaches its required working temperature.
  • Proven safe and effective by the Pros, now available in North America. TUV certified, made in Germany
8.8
Excellent
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10
8.7
Excellent
Save 27%
Liqui Moly Catalytic System Clean 300 ml 7110. Cleans The Injection System and The Combustion Chamber.
Liqui Moly

Liqui Moly Catalytic System Clean 300 ml 7110. Cleans The Injection System and The Combustion Chamber.

27% Off
Why we love it
  • Protects catalytic converter from soot.
  • Cleans injection system effectively.
  • Enhances fuel combustion efficiency.
Main Highlights
  • Protects the catalytic converter from clogging with soot.
  • Cleans the injection system and the combustion chamber.
  • Improves the combustion of the fuel.
  • Clean engines reduce fuel consumption and therefore CO2 emissions.
  • Suitable for all gasoline engines with a catalytic converter.
8.7
Excellent
Save 27%
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Related Deals You Might Like for Catalytic Converter Cleaner

📊We scanned 1996 products
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We reviewed the most relevant Catalytic Converter Cleaner offers across Amazon and leading retailers, covering major brands and models. Our shortlist features trusted names like Cataclean, DURA LUBE, MotorPower Care, Rislone, Generic, AUTOPROFI, Liqui Moly, known for dependable quality and smart design.
⭐
To determine today's best Catalytic Converter Cleaner, we analyzed 9981 real customer and expert reviews, focusing on satisfaction, real-world performance and long-term reliability. We also weigh each review's relevance, authenticity and freshness for a fair comparison.

Here's what we found:

🏆 #1
Cataclean Fuel & Exhaust System Cleaner – Pass Emissions Tests – Clear Check Engine Lights – Restores Catalytic Converters, DPF Filters and Cleans Fuel Systems, 16oz - Pack of 2 (120019)

Our overall winner is Cataclean Fuel & Exhaust System Cleaner – Pass Emissions Tests – Clear Check Engine Lights – Restores Catalytic Converters, DPF Filters and Cleans Fuel Systems, 16oz - Pack of 2 (120019) by Cataclean. It stands out for the right balance of quality, performance and value.

✨ What sets it apart:
✓Reduces hydrocarbon emissions significantly.
✓Restores engine performance effortlessly.
✓Clears check engine light codes.
💎 Best Value
Dura Lube Severe Catalytic and Exhaust Treatment Cleaner Fuel Additive | 16 Fl oz, 2-Pack

The best value for most shoppers is Dura Lube Severe Catalytic and Exhaust Treatment Cleaner Fuel Additive | 16 Fl oz, 2-Pack by DURA LUBE, with consistently high satisfaction across expert and customer reviews.

💰 Best Deal
Liqui Moly Catalytic System Clean 300 ml 7110. Cleans The Injection System and The Combustion Chamber.

The strongest deal right now for Catalytic Converter Cleaner is Liqui Moly Catalytic System Clean 300 ml 7110. Cleans The Injection System and The Combustion Chamber. at Liqui Moly, currently at 27% off.

🔄Our Catalytic Converter Cleaner ranking is updated regularly to reflect new releases and price changes—check back for the latest picks and deals.