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

Details

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

⛽Boosts fuel efficiency via carbon reduction

🔥Cuts hydrocarbon emissions by 50%

🛠️Restores catalytic converters & sensors

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1725061₫

Duties & taxes included

In stock

Sold byAmazon VietnamDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Details

Brand
Cataclean
Item Form
Liquid
Material Feature
Non-Toxic

Description

🚗💨 Clean fuel, clear lights, and a ride that’s always ready to impress!

SKIP COSTLY REPAIRS - Revives catalytic converters and oxygen sensors, potentially saving you thousands on exhaust system fixes.
UNIVERSAL ENGINE ALLY - Safe for gasoline, diesel, hybrid, and flex-fuel vehicles—your all-in-one performance booster.
DRIVE LIKE YOU MEAN IT - Smooths out power loss, hesitation, and rough idles for a noticeably sharper, more responsive ride.
FUEL EFFICIENCY REIMAGINED - Clears carbon build-up in fuel injectors and cylinder heads to maximize every drop of fuel.
SLASH EMISSIONS SAVE THE PLANET - Reduces total hydrocarbons by up to 50%, helping you breeze through emissions tests with confidence.

Cataclean Fuel & Exhaust System Cleaner is a powerful 16oz liquid formula designed to reduce hydrocarbon emissions by up to 50%, restore catalytic converters, DPF filters, and oxygen sensors, and improve overall vehicle performance. Safe for most fuel types, it effectively clears carbon deposits to enhance fuel efficiency and driveability, helping you pass emissions tests and avoid costly repairs.

Specifications

ASIN	B002BVXM92
Best Sellers Rank	#388 in Automotive ( See Top 100 in Automotive ) #3 in Fuel System Cleaners
Brand	Cataclean
Brand Name	Cataclean
Contains Liquid Contents?	Yes
Customer Reviews	4.2 out of 5 stars 15,327 Reviews
Global Trade Identification Number	00852135002004
Included Components	CATACLEAN EXST SYS/
Item Form	Liquid
Item Type Name	CATACLEAN EXST SYS/
Item Volume	500 Milliliters
Item Weight	0.85 Pounds
Manufacturer	Mr. Gasket Co.
Material Feature	Non-Toxic
Material Features	Non-Toxic
Model Number	120007
Number of Items	1
Part Interchange Info	120007
Part Number	120007
Scent	Unscented
Size	1 Fl Oz (Pack of 1)
Special Features	Alcohol Based
Specific Uses For Product	Engine
Surface Recommendation	Acrylic
UPC	852135002004
Unit Count	1.0 Fluid Ounces
Warranty Description	LIMITED WARRANTY

Reviews

J**K

28.04.2026

D**Y

9.04.2026

L**S

3.03.2016

A**R

4.04.2026

J**N

25.02.2026

M**.

30.12.2022

R**E

1.05.2026

A**S

15.04.2026

A**L

25.11.2024

R**A

9.12.2025

M**K

21.11.2018

N**O

7.06.2025

O**Y

4.03.2025

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1725061₫

Duties & taxes included

In stock

Sold byAmazon VietnamDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Vietnam.

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