Top 10 Catalytic Converter Cleaners (April 2024)

DURA LUBE Severe Catalytic and Exhaust Treatment Emissions Test Catalytic – ⭐ Best Overall Catalytic Converter Cleaner

HL-402409 by DURA LUBE

8542038518 by Cataclean

Restores Catalytic Converter, Oxygen Sensors, Fuel Injectors and cylinder heads
EPA Approved
Easy to use -Simply pop, pour and go every 3 months
Original long nose bottle which is capless gas tank compatible
Does not alter fuel composition and is safe for gasoline, diesel and Hybrid engines

120007 by Cataclean

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

120018CAT by Cataclean

Restores, maintains & helps protect the catalytic converter, oxygen sensors, fuel injectors, and cylinder heads
3L packaging – Treats up to 30 gallons of fuel
Packaging versions to cater to Gasoline, Diesel, and Marine markets
Safe for gasoline, E10, E15, and E85 fuels
Does not alter fuel composition

⭕ Safe for gasoline, diesel, hybrid, and flex-fuel vehicles; does not alter fuel. Not for use in 2-stroke or oil/gas mix engines. 💯 Easy cleaning , simply pour in your fuel tank.
Deeply clean your converter with Catalytic Converter Cleaner without removing it! Stop the dreaded “service engine” light flashing up on your display, and get better engine performance!
Better engine performance: help clean the fuel injection system, as well as the cylinders, improving overall performance. lower your total hydrocarbon emissions by up to 50 percent.
Clean the entire system : it can also clean other parts like the oxygen sensor, the fuel injectors, cylinder heads, and others.
Protect engine : Proper fuel and exhaust flow will keep that engine running cleaner, smoother, and better, which will also cut down on maintenance costs.

43243-1 by AUTOPROFI

Safe and effective for all petrol (gasoline)and diesel 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

HG3270s by Hi-Gear

120007-2PK by Cataclean

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

CAT-1 by Solder-It

MK-10351-06 by Motorkote

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