CR12 Catalytic Restore Emission Treatment 12 oz – Catalytic Converter Cleaner & O2 Sensor Fuel Additive | Reduces Carbon Buildup & Hydrocarbon Emissions | Treats Up to 20 Gal of Gasoline

CLEANS CATALYTIC CONVERTERS & OXYGEN SENSORS: This concentrated fuel additive helps dissolve carbon deposits that build up on catalytic converter substrates and oxygen sensor elements over time. Deposit buildup is the leading cause of reduced converter efficiency, false O₂ readings, sluggish acceleration, and rising fuel consumption — CR12 targets all of it in a single tank.
HELPS ADDRESS P0420 CODES & EMISSION TEST FAILURES: Formulated to help resolve catalyst efficiency codes like P0420 and P0430 when deposits are the root cause. Add CR12 before your next emissions inspection and drive through a few warm-up cycles to let the treatment work. If warning lights persist after treatment, have the vehicle inspected to rule out sensor faults, exhaust leaks, or physical catalyst damage.
RESTORES THROTTLE RESPONSE, SMOOTHER IDLE & IMPROVED FUEL ECONOMY: Carbon deposits don’t just affect emissions — they degrade drivability. By cleaning the converter, O₂ sensors, and upstream emission components, CR12 helps restore the air-fuel feedback loop your engine management system depends on, supporting more responsive acceleration, smoother shifting, and reduced exhaust odor.
SAFE FOR ALL GASOLINE & HYBRID ENGINES: Compatible with PFI, GDI, turbocharged, and start-stop powertrains including EcoBoost, GTDI, and Ecotec platforms. Oxygen-sensor safe, catalytic-converter safe, and capless-filler compatible. Works with all grades of unleaded gasoline. Not for diesel engines.
EASY TO USE — 12 OZ TREATS UP TO 20 GALLONS: Simply add to a near-empty tank and fill up (1 oz per 1.5 gallons). Drive normally for at least 15 minutes and let CR12 do the work. Use every 3,000 miles for ongoing deposit control, or as needed when you notice drivability changes. No tools, no draining, no mechanic required. Subscribe & Save available for scheduled delivery