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Bars Leaks Fuel System Cleaner 4720 Rislone; Use To Clean Fuel Catalytic Converter And Emission System; 16.9 Fluid Ounce Bottle; Single

<ul><li><strong>Emissions Reduction</strong>: Cleans fuel and exhaust system to reduce excess exhaust hydrocarbon, CO, and NO<sub>X</sub> emissions.</li><li><strong>Deposit Removal</strong>: Contains synthetic detergents to remove IVD intake valve deposits, CCD combustion chamber deposits, and other fuel deposits.</li><li><strong>Catalytic Converter Restoration</strong>: Reduces zinc and phosphorus catalyst contamination, restoring catalytic converter function.</li><li><strong>Sensor Cleaning</strong>: Cleans O2 Lambda oxygen sensor tip.</li><li><strong>Odor Elimination</strong>: Deodorizes sulfur exhaust smell.</li></ul>

<ul><li>Cleans Fuel And Exhaust System – Reduces Excess Exhaust Hydrocarbon, CO And NO X Emissions And Saves Gas</li><li>Contains Outstanding Synthetic Detergents To Remove IVD Intake Valve Deposits, CCD Combustion Chamber Deposits And Other Fuel Deposits</li><li>Reduces Zinc And Phosphorus Catalyst Contamination, Restoring Catalytic Converter Function</li><li>Cleans O2 Lambda Oxygen Sensor Tip</li><li>Deodorizes Sulphur Exhaust Smell</li><li>Helps Pass Emissions Smog Test, Guaranteed</li><li>No Supplier Warranty</li></ul>

Brand

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Fuel System Cleaner, Rislone ®, Use To Clean Fuel Catalytic Converter And Emission System, 16.9 Fluid Ounce Bottle, Single

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Light

Ease Of Use

Instructions

Engine

Price

Performance

Code

Emissions

Exhaust

Power Level

Fuel

Converter

Efficiency

Acceleration

Smell

Value

Quality

Economy

Sensors

Drive

Tank

Sound

Injectors

Features straightforward application process and easy instructions.

Offers good value compared to alternatives.

I just got this product earlier this morning and I turned off my check engine light this morning before day light so I’m going to go and look at how many miles and what the instructions of the company on what to be done and then I’ll rate this product… stay tuned

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My car check engine light came on and the code was saying I needed to replace the catalytic converter but all it needed. Was that stuff added to my gas tank and it cleaned out the exhaust system. It's working great save my car check engine light came on and the code was saying I needed to replace the catalytic converter but all it needed. Was that stuff added to my gas tank and it cleaned out the exhaust system. It's working great saved me a bunch of money. me a bunch of money.

Huge savings

Bought this catalytic converter cleaner because my car was out here coughing like a 90-year-old smoker.

Poured it in the tank like “heal, old friend,” and I swear the check engine light blinked like, “…okay, I’ll chill for now.” Car smells less exhaust-y, runs a little smoother, and I feel like a mechanic even though I did nothing but dump a bottle in the gas.

What it did:
	•	Made me feel responsible
	•	Quieted whatever gremlin was rattling in there
	•	Saved me from Googling “how much is a new catalytic converter” and crying

What it didn’t do:
	•	Turn my 2010 into a Tesla
	•	Fix the mysterious rattle in the back that’s 100% just kid stuff rolling around

8/10 — cheaper than the mechanic, easier than pretending I know what an O2 sensor does. 🛠️⛽️

Clean as a whistle

Awesome. I had Check engine light on with P0420 code on my  3rd Gen 4Runner. Added this according to instructions and within a few weeks light was off, power and fuel economy was restored. Past Emissions test. 
Saved $1,750 on purchasing  new Cat converter.

Worked great on my 3rd Gen 4Runner

It took my engine light off after driving about 200 miles..once it came off the engine light came back on about 100 miles later..on my 2009 BMW 328i xdrive sedan N51

I can't complain too awful much it DID turn my p0420 check engine light off but I only gave it 4 stars because it popped right back on again after just a few days. This could be a great product to just quickly get through emissions but I would say it's definitely just a band-aid for a bigger problem and would not use it as a fix for much longer than just a few days to weeks.

Great for a few days.

Tried it 3 times and followed instructions, nothing changed.  Didn’t work and couldn’t notice any change except the light was still on .  Their warranty is proof of purchase and a smog test failure, so much for that.

Disappointed

DOES NOT WORK! I bought this a second time after the first use did not clear the code. Used this both times per the directions. I had proof of purchase on Walmart's website, but didn't keep the packages. Rislone would not refund anything without the package material. That's fine, but it really did not work at all. WASTE OF MONEY!!!

WASTE OF MONEY!!!

It advertises to turn off engine light but it didn’t I had to wait and use another brand that did do the job .

Didn’t work as advertised

my check engine light is on. This product guarantees that light will go out. I did the instructions exactly as written and the light never went off and is still on after 300 miles.

Bars Leaks Fuel System Cleaner 4720 Rislone; Use To Clean Fuel Catalytic Converter And Emission System; 16.9 Fluid Ounce Bottle; Single

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