EZ PASS Emissions Treatment fuel additive — 16 fl oz (single) for catalytic converter & O2 sensor cleaning, smog test prep

EZ PASS™ Emissions Treatment is a ready-to-use fuel additive that helps clean catalytic converters, oxygen sensors, injectors and combustion chambers when poured into a full tank and driven at highway speed.

If you're preparing for a smog or state emissions inspection or simply want to support your vehicle's exhaust system performance, this gasoline additive is formulated to work through the fuel system during normal driving. The concentrated 16 fl. oz. bottle treats up to 16 gallons of gasoline and is designed to reduce the carbon and exhaust deposits that can interfere with sensor readings and exhaust flow. Use as directed for a single pre-test treatment or regularly as part of maintenance.

How does EZ PASS help my vehicle before a smog test?

When added to a full tank, the formula circulates with fuel and reaches components in the combustion and exhaust systems during driving. It targets carbon and residue that may contribute to higher hydrocarbon readings or sluggish converter performance, aiming to improve overall emissions-related operation.

• Add one 16 fl. oz. bottle to a full tank (treats up to 16 gallons).
• Drive 10–15 minutes at highway speed with the engine fully warmed.
• Intended as a preparatory step before inspections, not a guaranteed pass.

Can this restore a failing catalytic converter or O2 sensor?

This additive is formulated to reduce deposits that impair catalytic and sensor performance, but it cannot repair mechanical damage or severely deteriorated components. If a converter or sensor is physically damaged or beyond wear limits, professional diagnosis and replacement may be required.

• Helps remove carbon buildup that can restrict exhaust flow.
• May improve oxygen sensor readings when deposits are the issue.
• Not a substitute for repair of faulty or physically broken parts.

How and how often should I use the product for best results?

Pour one bottle into a full tank of gasoline and drive at highway speeds for 10–15 minutes with the engine at normal operating temperature to allow distribution through the fuel and exhaust systems. For ongoing upkeep, apply the treatment every 2,000 miles as part of routine maintenance.

• One 16 fl. oz. bottle treats up to 16 gallons of fuel.
• Single-use before a smog test or repeat every 2,000 miles for maintenance.
• Results depend on vehicle condition, driving, and maintenance history.

What safety and compatibility points should I know?

The formula is intended for use in gasoline-powered vehicles that use conventional catalytic converters and O2 sensors. Always follow label directions and the vehicle manufacturer's fuel and additive recommendations. Keep containers sealed and store away from heat or open flame.

• Intended for gasoline engines; check manufacturer guidance for specialized fuels.
• Do not exceed recommended dosage or mix with incompatible additives.
• If in doubt, consult a mechanic before use on older or modified emissions systems.

Who is this for? EZ PASS™ Emissions Treatment suits drivers and fleet managers who want a simple, over-the-counter way to help reduce exhaust-system deposits before inspections or as part of routine care. It’s recommended for owners of gasoline vehicles seeking an easy maintenance step to support catalytic converter and oxygen sensor performance, while understanding that severely worn or damaged parts may still need professional attention.