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Cataclean - Fuel and Exhaust System Cleaner - Diesel - 16 oz.

The Original Liquid Science. Patented & EPA approved Complete Engine, Fuel and Exhaust System Cleaner Reduces Emissions and Improves Overall Engine Performance

Part # 120007DE
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Cataclean Diesel is a patented & EPA Approved complete engine, fuel and exhaust system cleaner that reduces carbon build-up and also cleans your vehicle's oxygen sensors, fuel injectors and cylinder heads. Cataclean does not alter fuel composition and is safe for diesel engines. Testing at an independent emissions testing facility showed using Cataclean can lower your total hydrocarbon emissions (Performance results are dependent on driver habits and vehicle condition.) Use Cataclean to fix drivability issues such as power reduction, hesitation and hard starts, as a pre-treatment before an emissions test or to extend the life of your vehicle. A well-running engine helps to restore and maintain catalytic converter efficiency. Use four times a year to help maintain proper engine operation.


  • EPA Approved
  • Patented Fuel and Exhaust System Cleaner
  • Original long nose bottle which is capless gas tank compatible
  • Lowers Particulate Emissions and Reduces Risk of DPF Clogging
  • Reduces Diesel Particulate Build-Up Actively Helpoing the DPF to Regenerate
  • Easy To Use Simply Pop Pour And Go Every 3-Months
  • Maintains and Restores Catalytic Converter Efficiency
  • Improves Engine Performance and Fuel Efficiency
  • Ideal for Stop/Start and Urban Driving

About Cataclean

Cataclean is a patented fuel and exhaust system cleaner that reduces carbon build-up and also cleans your vehicle's oxygen sensors, fuel injectors, and cylinder heads. Reduced carbon buildup increases power, fuel economy, and improves emissions output.

Brand Cataclean
Emission Code5
Product TypeCataclean and Chemicals
Part Number120007DE

This part is legal for sale or use on Emissions Controlled Vehicles, Uncontrolled (Non-Emissions Controlled) Vehicles, and Racing Use Only Vehicles because it does not affect vehicle emissions and is not covered by emissions regulations.

Pour entire content of bottle into fuel tank then drive for at least 15 minutes and refuel when necessary. For best results it is recommended to add one bottle of CATACLEAN® LIQUID SCIENCE to approximately 1/4 tank of fuel.

*Free Shipping & Handling only offered to the contiguous US on orders over $100, excludes clearance parts and oversized packages.

Some parts are not legal for use in California or other states with similar regulations.