10 Best Catalytic Converter Cleaners 2020

Gareth Otwell Reviewed by Gareth Otwell | Last Updated:

After analyzing 670 products, scanning 4210 reviews, spending more than 36 hours of research and speaking with our test users, we think the Cataclean 120007 Complete Engine is the one of the Best Catalytic Converter Cleaner on the market.

# Image Name Brand Price
1
⭐Best Choice
Cataclean 120007 Complete Engine
Cataclean 120007 Complete Engine, Fuel and Exhaust System Cleaner, 473 Milliliter Check price Cataclean $$$$$ Check price
2
👑Premium Pick
Cataclean 120018CAT Cataclean Fuel And Exhaust System Cleaner Special Formula
Cataclean 120018CAT Cataclean Fuel And Exhaust System Cleaner Special Formula For Use w/Gasoline Engines 3 Liters Cataclean Fuel And Exhaust System Cleaner Check price Cataclean $$$$$ Check price
3 Motorkote MK-10351-06 Catalytic and Exhaust Treatment Emissions Control Motorkote MK-10351-06 Catalytic and Exhaust Treatment Emissions Control Check price Motorkote $$$$$ Check price
4 Solder-It (CAT-1) Catalytic Converter Cleaner Solder-It (CAT-1) Catalytic Converter Cleaner - 16 oz. Check price Solder-It $$$$$ Check price
5
💲Best value for the money
CRC 05063 12 Fluid Ounce Guaranteed to Pass Emissions Test
CRC 05063 12 Fluid Ounce Guaranteed to Pass Emissions Test Formula Check price CRC $$$$$ Check price
6 Royal Purple Max-Clean Fuel System Cleaner and Stabilizer 11722 Royal Purple Max-Clean Fuel System Cleaner and Stabilizer 11722 Check price Royal Purple $$$$$ Check price
7 Hi-Gear HG3270s EZ Emissions Pass and Catalytic Converter Cleaner Hi-Gear HG3270s EZ Emissions Pass and Catalytic Converter Cleaner - 15 fl. oz. Check price Hi-Gear $$$$$ Check price
8 Chevron Techron Concentrate Plus Fuel System Cleaner Chevron Techron Concentrate Plus Fuel System Cleaner - 20 oz. Check price Chevron $$$$$ Check price
9 OXICAT OXICAT - Oxygen Sensor & Catalytic Converter Cleaner Check price AUTOPROFI $$$$$ Check price
10 Red Line (60103) Complete SI-1 Fuel System Cleaner Gas and Red Line (60103) Complete SI-1 Fuel System Cleaner Gas and Injector Additive Treatment-15 oz Bottle Check price Red Line $$$$$ Check price

Cataclean 120007 Complete Engine – Best Overall Catalytic Converter Cleaner

Cataclean 120007 Complete Engine
  • 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

Cataclean 120018CAT Cataclean Fuel And Exhaust System Cleaner Special Formula – Premium Pick

Cataclean 120018CAT Cataclean Fuel And Exhaust System Cleaner Special Formula
  • 3L packaging - Treats up to 30 gallons of fuel
  • Safe for gasoline, E10, E15, and E85 fuels
  • Restores, maintains & helps protect the catalytic converter, oxygen sensors, fuel injectors, and cylinder heads

Motorkote MK-10351-06 Catalytic and Exhaust Treatment Emissions Control

Motorkote MK-10351-06 Catalytic and Exhaust Treatment Emissions Control
  • Use when warning light is activated
  • Use before or prior to replacing catalytic converter
  • Protects catalytic system from oil poisons
  • Reduces phosphorus and zinc retention levels at catalyst inlet
  • Helps clean oxygen ( O2 ) sensor(s), lowers tail pipe emissions, works great for P0420 Catalytic Converter Code

Solder-It (CAT-1) Catalytic Converter Cleaner

Solder-It (CAT-1) Catalytic Converter Cleaner
  • Helps eliminate "rotten egg" odor
  • May help in passing emissions control test!
  • Helps clean oxygen sensor
  • Extends time between tune-ups

CRC 05063 12 Fluid Ounce Guaranteed to Pass Emissions Test – Best Budget Catalytic Converter Cleaner

CRC 05063 12 Fluid Ounce Guaranteed to Pass Emissions Test
  • Reduces emissions and improves performance in one tank full
  • Powerful detergent additives super-clean the entire fuel system
  • Use every 3,000 miles to improve fuel economy, acceleration and reduce emissions
  • Maximum allowable cleaning chemistry for superior results.
  • Works with all gasoline and ethanol blended fuels.

Royal Purple Max-Clean Fuel System Cleaner and Stabilizer 11722

Royal Purple Max-Clean Fuel System Cleaner and Stabilizer 11722
  • 3-in-1 fuel additive keeps new engines clean and improves vehicle's performance
  • Improves fuel economy an average of 3.2 percent
  • Increases horsepower an average of 2.6 percent
  • Reduces hydrocarbon, NOx and CO emissions (on average 12, 13 and 18-percent respectively)
  • Prevents rough idle, hesitation and stalling

Hi-Gear HG3270s EZ Emissions Pass and Catalytic Converter Cleaner

Hi-Gear HG3270s EZ Emissions Pass and Catalytic Converter Cleaner
  • Cleans fuel system, injectors, combustion chamber, pistons and valves
  • Restores lost horsepower and increases fuel efficiency
  • Prevents rotten egg smell
  • Reduces toxic gases and CO2 emissions
  • Removes carbon deposits

OXICAT

OXICAT
  • Safe and effective for all petrol (gasoline), diesel and hybrid 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

Red Line (60103) Complete SI-1 Fuel System Cleaner Gas and

Red Line (60103) Complete SI-1 Fuel System Cleaner Gas and
  • DESIGNED TO EXCEED EXPECTATIONS - Red Line Complete SI-1 Fuel System Cleaner treatment for cleaning & preventing corrosion in fuel systems
  • PERFORM & PROTECT - Fuel additive cleans injectors, carburetors, valve & combustion chamber deposits with a powerful concentrated blend of high-temp and low-temp detergents
  • EFFICIENT FUEL BURN - Gas treatment that enhances gasoline stability, while reducing the buildup of gum and varnish formation
  • EASY TO USE - Use one bottle per tank for most effective treatment, additive cleans nearly 100% efficiency in one treatment
  • WHY RED LINE - Established in 1979, Red Line Products perform & protect better than any on the market. No compromises

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