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10 Best catalytic converter cleaners of 2026

Explore top picks
  • Best Choice

    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)
    Cataclean
    9.7
    Exceptional

    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)

    • Maximum Hydrocarbon Emission Reduction:50%
    • Type:Fuel & Exhaust System Cleaner
    • Volume per Bottle:16oz
    • Pack Size:2
    • Compatible Engines:Gasoline, diesel, and hybrid
  • Powerful technology We scan thousands of products and stores, analyzing reviews to find what matters most to users like you
    Careful review Our team ensures quality, value, and fit based on real user feedback
    Trusted insights AI and human analysis guide your decisions, reflecting real user priorities
    Real users impact
    • Thousands of users trust our site daily
    • Based on millions of stores and reviews
    • Shoppers influence our rankings
  • Value for Money

    2

    Liquii Moly 8931 Catalytic-System Cleaner, Uncoloured - 2 PACK
    Generic
    9.6
    Exceptional

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

  • 3

    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
    9.5
    Excellent

    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

  • 4

    Cataclean Fuel & Exhaust System Cleaner – Pass Emissions Tests – Clear Check Engine Lights – Restores Catalytic Converters, DPF Filters and Cleans Fuel Systems, 16oz (120007)
    Cataclean
    9.4
    Excellent

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

  • 5

    Dura Lube Severe Catalytic and Exhaust Treatment Cleaner Fuel Additive | 16 Fl oz, 2-Pack
    DURA LUBE
    9.3
    Excellent

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

    • manufacturer part number: HL-40240-02
    • exterior: Box
    • country of origin: USA
    • customer reviews:4.1 4.1 out of 5 stars 165 ratings 4.1 out of 5 stars
    • asin:B0BS1WMRRS
  • See Today’s Deals & Prices

  • 6

    OXICAT- Oxygen Sensor & Catalytic Converter Cleaner-Engine, Fuel & Exhaust- Pack of 2 FOR PREVENTIVE MAINTENANCE
    AUTOPROFI
    9.2
    Excellent

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

  • 7

    Rislone 4720 Cat Complete Fuel, Exhaust and Emissions System Cleaner,16.9 oz. | Cleans Catalytic Converter, Reduces Emissions & Saves Gas
    Rislone
    9.1
    Excellent

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

  • 8

    Catalytic Converter Cleaner Auto Parts Engine, Exhaust System Pipe Carbon Removal Cleaner Treatment Additive Oil, Fuel System Treatment Oil Additive for Gas and Diesel Car Upgraded Solid Particles
    WhyBox
    8.9
    Very Good

    Catalytic Converter Cleaner Auto Parts Engine, Exhaust System Pipe Carbon Removal Cleaner Treatment Additive Oil, Fuel System Treatment Oil Additive for Gas and Diesel Car Upgraded Solid Particles

  • 9

    Ciirvoe 6Pcs Catalytic Converter Cleaner Kit,Boost Up Catalytic Convertor Cleaner,Exhaust System Pipe Carbon Removal Cleaner Treatment Additive Oil,Fuel System Treatment Oil Additive
    Ciirvoe
    8.8
    Very Good

    Ciirvoe 6Pcs Catalytic Converter Cleaner Kit,Boost Up Catalytic Convertor Cleaner,Exhaust System Pipe Carbon Removal Cleaner Treatment Additive Oil,Fuel System Treatment Oil Additive

  • 10

    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
    8.5
    Good

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

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