What if you can't go on highway my car won't go past 30mph?

I don't believe that it will help if your car will not go above 30. Sounds like something more serious with your vehicle.

How many miles will this take to unclog a 2005 sentra 1.8l cat, that revs only to 2700 rpm, with no error codes?

It sounds to me as if your cat is beyond repair. If you’ve already used a bottle it should fix it pretty quickly. If your car runs no better, you need a new converter. That’s what happened to me, I had to buy a new converter.

Once you add this product to the gas tank what is the rest of the process?

add the product to the gas tank when it close to empty - for me that was about 2-3 gallons remaining - then really ran the car hard (like I stole it) - - filled the tank with high test and some injector cleaner- and again ran the car hard - check engine light stayed off for a good 6-8 hundred miles - more than long enough to pass NC emissions test - the light did eventually come back on - but then realized it was the fuel my wife purchased - - as I had her fill up with a different brand and light turned off

One person posted that they used a combination of "cataclean and solder it" in the gas tank? what is solder it - can anyone post a link?

Never heard of that but you shouldn't have to mix anything with our Cataclean

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Cataclean Fuel & Exhaust System Cleaner – Pass Emissions Tests – Clear Check Engine Lights – Restores Catalytic Converters, DPF Filters and Cleans Fuel Systems, 16oz (120007)

Cataclean Fuel & Exhaust System Cleaner – Pass Emissions Tests – Clear Check Engine Lights – Restores Catalytic Converters, DPF Filters and Cleans Fuel Systems, 16oz (120007)

Product ID: 2326665

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Brand
Cataclean
Item Form
Liquid
Scent
Unscented
Specific Uses For Product
Engine
Material Feature
Non-Toxic

⛽Improves fuel economy & engine power

✅Clears check engine light codes

🔥50% hydrocarbon emission reduction

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Description

🚗 Clean fuel, clear roads, zero worries.

EFFORTLESS MAINTENANCE - Just pour into your fuel tank—no tools, no hassle, compatible with gas, diesel, and hybrid engines.
BOOST FUEL EFFICIENCY POWER - Clean fuel injectors and cylinder heads for sharper combustion and better mileage—feel the difference on every drive.
PASS EMISSIONS WITH CONFIDENCE - Slash carbon build-up and breeze through smog tests with cleaner catalytic converters and DPF filters.
PROLONG CATALYTIC CONVERTER LIFE - Prevent carbon clogging to keep your converter running smoothly and extend its lifespan.
SAY GOODBYE TO CHECK ENGINE LIGHTS - Resolve common error codes like P0420 and P0171, saving you costly repairs and stress.

Cataclean Fuel & Exhaust System Cleaner is a 16oz alcohol-based formula designed to reduce carbon deposits, improve fuel combustion, and restore catalytic converter and DPF filter efficiency. It cuts hydrocarbon emissions by up to 50%, clears common check engine light codes, and is safe for gasoline, diesel, and hybrid engines—helping your vehicle pass emissions tests and boost performance with minimal effort.

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TrustScore 4.5 | 7,300+ reviews

Anjali K.

The product quality is outstanding. Exactly what I needed for my work.

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Excellent communication throughout the order process. Product is perfect.

2 weeks ago

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Manufacturer	Mr. Gasket Co.
Brand	Cataclean
Model	CATACLEAN EXST SYS/
Item Weight	1 pounds
Product Dimensions	2.68 x 2.68 x 9.06 inches
Item model number	120007
Is Discontinued By Manufacturer	No
Exterior	Machined
Manufacturer Part Number	120007
OEM Part Number	120007
Special Features	Alcohol Based

Cataclean Fuel & Exhaust System Cleaner – Pass Emissions Tests – Clear Check Engine Lights – Restores Catalytic Converters, DPF Filters and Cleans Fuel Systems, 16oz (120007)

Details

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