---
title: "catalytic convertor cleaner — Niche Verdict: Worth a look (57/100) | Amazon United States - Flapen"
canonical_url: "https://flapen.com/amazon/research/us/automotive/catalytic-convertor-cleaner"
last_updated: "2026-07-10T03:35:32.628Z"
locale: en
meta:
  description: "catalytic convertor cleaner shows low returns (0.4%), but a concentrated shelf (top 5 take 71% of clicks) keeps it on the watch list."
  "og:description": "catalytic convertor cleaner shows low returns (0.4%), but a concentrated shelf (top 5 take 71% of clicks) keeps it on the watch list."
  "og:title": "catalytic convertor cleaner — Niche Verdict: Worth a look (57/100) | Amazon United States - Flapen"
---

Back to Flapen home

# **catalytic convertor cleaner**

**Worth a look****57/100 **

catalytic convertor cleaner shows low returns (0.4%), but a concentrated shelf (top 5 take 71% of clicks) keeps it on the watch list.

**Market/yr**

**$1.7M**

**Growth (1y)**

**+165.8%**

**Products**

**19**

**Brands**

**10**

was 13 a year ago

**Sellers**

**88**

**Price range**

**$12.15–$76.77**

**Returns**

**0.4%**

**Rating**

**4.3★**

**Worth a look**

Scored 57/100 across market size, growth, competition, quality gap, and returns.

Market sizeGrowthCompetitionQuality gapReturns

Market size

**46**

 ×0.30

Growth

**73**

 ×0.30

Competition

**28**

 ×0.20

Quality gap

**58**

 ×0.10

Returns

**97**

 ×0.10

## **Demand**

Weekly Amazon search volume, last 104 weeks — +165.8% year over year.

25K12KSpike '25Spike '26Jul '24Nov '24Mar '25Jul '25Nov '25Mar '26

## **Seasonality**

Monthly demand index across the year — 1.00 is average.

JFMAMJJASOND

No pronounced peak months · busiest ÷ quietest = 1.2×

## **Competition**

- Cataclean44% - Liqui Moly26% - MotorPower Care14% - DURA LUBE6% - Ciirvoe3% - EZ PASS2% - Other (4 brands)6%

The top 5 products capture 71% of clicks — a locked-up shelf that new listings rarely crack. 10 brands and 88 sellers compete here.

**Brands**

**10 **▼falling

was 13 a year ago

**Sellers**

**88**

**Top 5 brand share**

**93%**

#ProductBrandPriceRatingReviewsClick shareTrend

1
![Liqui Moly Catalytic System Clean 300 ml 7110. Cleans The Injection System and The Combustion Chamber.](https://m.media-amazon.com/images/I/41cEqZoV8jL.jpg) [**Liqui Moly Catalytic System Clean 300 ml 7110. Cleans The Injection System and The Combustion Chamber.**](https://www.amazon.com/dp/B07Z54MBQ3)

Liqui Moly$18.254.4★3,73622%▼falling

2
![Cataclean Fuel & Exhaust System Cleaner For Gasoline Engines Pass Emissions Tests Clear Check Engine Lights Restores Catalytic Converters and Cleans Fuel Systems 16oz - Pack of 2 (120019)](https://m.media-amazon.com/images/I/41nTWcYvkIL.jpg) [**Cataclean Fuel & Exhaust System Cleaner For Gasoline Engines Pass Emissions Tests Clear Check Engine Lights Restores Catalytic Converters and Cleans Fuel Systems 16oz - Pack of 2 (120019)**](https://www.amazon.com/dp/B07N7RZ5ZV)

Cataclean$46.474.2★15,53818%▲rising

3
![Cataclean Fuel & Exhaust System Cleaner For Gasoline Engines Pass Emissions Tests Clear Check Engine Lights Restores Catalytic Converters and Cleans Fuel Systems 16oz (120007)](https://m.media-amazon.com/images/I/316798QcU5L.jpg) [**Cataclean Fuel & Exhaust System Cleaner For Gasoline Engines Pass Emissions Tests Clear Check Engine Lights Restores Catalytic Converters and Cleans Fuel Systems 16oz (120007)**](https://www.amazon.com/dp/B002BVXM92)

Cataclean$27.094.2★15,53817%▼falling

4
![MotorPower Care Catalytic Converter Cleaner 2-Pack Pass Smog & Emissions Test Fix P0420/P0430 Check Engine Light | O2 Sensor & EGR Cleaner | Fuel Additive 8.45 fl oz Each](https://m.media-amazon.com/images/I/51sGHyaOPwL.jpg) [**MotorPower Care Catalytic Converter Cleaner 2-Pack Pass Smog & Emissions Test Fix P0420/P0430 Check Engine Light | O2 Sensor & EGR Cleaner | Fuel Additive 8.45 fl oz Each**](https://www.amazon.com/dp/B0CDFTF8NK)

MotorPower Care$29.974.2★8897%▼falling

5
![MotorPower Care Catalytic Converter Cleaner Pass Emissions Test & Fix P0420 | Cleans O2 Sensor EGR Valve & Exhaust System | Fuel Additive for Gas & Hybrid Engines 8.45 fl oz](https://m.media-amazon.com/images/I/418wIr2yIDL.jpg) [**MotorPower Care Catalytic Converter Cleaner Pass Emissions Test & Fix P0420 | Cleans O2 Sensor EGR Valve & Exhaust System | Fuel Additive for Gas & Hybrid Engines 8.45 fl oz**](https://www.amazon.com/dp/B07DCYT2F7)

MotorPower Care$16.914.1★1,0557%▲rising

6
![Cataclean (120007-2PK) Fuel and Exhaust System Cleaner - 16 fl. oz. (Pack of 2)](https://m.media-amazon.com/images/I/41vx05BlpbL.jpg) [**Cataclean (120007-2PK) Fuel and Exhaust System Cleaner - 16 fl. oz. (Pack of 2)**](https://www.amazon.com/dp/B00MXF4N8U)

Cataclean$46.474.3★1,0834%—flat

7
![Dura Lube Severe Catalytic and Exhaust Treatment Cleaner Fuel Additive 16 fl. oz. (PN: HL-402409 PDQ3)](https://m.media-amazon.com/images/I/415x1AcQ5TL.jpg) [**Dura Lube Severe Catalytic and Exhaust Treatment Cleaner Fuel Additive 16 fl. oz. (PN: HL-402409 PDQ3)**](https://www.amazon.com/dp/B07HB7YVFG)

DURA LUBE$18.104.1★6,2324%▲rising

8
![Cataclean Fuel & Exhaust System Cleaner For Gasoline Engines Pass Emissions Tests Clear Check Engine Lights Restores Catalytic Converters and Cleans Fuel Systems 3L (120018CAT)](https://m.media-amazon.com/images/I/41w96XAsjdL.jpg) [**Cataclean Fuel & Exhaust System Cleaner For Gasoline Engines Pass Emissions Tests Clear Check Engine Lights Restores Catalytic Converters and Cleans Fuel Systems 3L (120018CAT)**](https://www.amazon.com/dp/B0739TGHW8)

Cataclean$76.774.2★15,5383%▲rising

9
![Ciirvoe 3Pcs Catalytic Converter Cleaner Kit Boost Up Catalytic Convertor Cleaner Exhaust System Pipe Carbon Removal Cleaner Treatment Additive Oil Fuel System Treatment Oil Additive](https://m.media-amazon.com/images/I/517Kokx4BDL.jpg) [**Ciirvoe 3Pcs Catalytic Converter Cleaner Kit Boost Up Catalytic Convertor Cleaner Exhaust System Pipe Carbon Removal Cleaner Treatment Additive Oil Fuel System Treatment Oil Additive**](https://www.amazon.com/dp/B0GGR62D24)

Ciirvoe$12.154.2★1033%▲rising

10

![Dura Lube Severe Catalytic and Exhaust Treatment Cleaner Fuel Additive | 16 Fl oz 2-Pack](https://m.media-amazon.com/images/I/51qb5Y-wIIL.jpg) [**Dura Lube Severe Catalytic and Exhaust Treatment Cleaner Fuel Additive | 16 Fl oz 2-Pack**](https://www.amazon.com/dp/B0BS1WMRRS)

DURA LUBE$34.354.1★6,2322%▼falling

11

![Liqui Moly Jectron Gasoline Fuel Injection Cleaner-2pk](https://m.media-amazon.com/images/I/41fXZ3UNc0L.jpg) [**Liqui Moly Jectron Gasoline Fuel Injection Cleaner-2pk**](https://www.amazon.com/dp/B00LPUO1DQ)

Liqui Moly$24.024.7★7452%▲rising

12

![EZ PASS Emissions Treatment | Catalytic Converter & O2 Sensor Cleaner | Emissions System Support | Smog Test Prep | 16 Fl oz 2-Pack](https://m.media-amazon.com/images/I/41nfHylGk9L.jpg) [**EZ PASS Emissions Treatment | Catalytic Converter & O2 Sensor Cleaner | Emissions System Support | Smog Test Prep | 16 Fl oz 2-Pack**](https://www.amazon.com/dp/B0GMYBZXMN)

EZ PASS$37.063.5★162%▲rising

13

![Catalytic Converter Cleaner Auto Parts Engine Exhaust System Pipe Carbon Removal Cleaner Treatment Additive Oil Fuel System Treatment Oil Additive for Gas and Diesel Car Upgraded Solid Particles](https://m.media-amazon.com/images/I/51H4RrzkhmL.jpg) [**Catalytic Converter Cleaner Auto Parts Engine Exhaust System Pipe Carbon Removal Cleaner Treatment Additive Oil Fuel System Treatment Oil Additive for Gas and Diesel Car Upgraded Solid Particles**](https://www.amazon.com/dp/B0H19Y4NBZ)

WhyBox$17.664.8★112%▲rising

14

![Liquii Moly 8931 Catalytic-System Cleaner Uncoloured - 2 PACK](https://m.media-amazon.com/images/I/41HX1Af18EL.jpg) [**Liquii Moly 8931 Catalytic-System Cleaner Uncoloured - 2 PACK**](https://www.amazon.com/dp/B0DT76XVKY)

Generic$34.804.4★692%▲rising

15

![Rislone 4720 Cat Complete Fuel Exhaust and Emissions System Cleaner 16.9 oz. | Cleans Catalytic Converter Reduces Emissions & Saves Gas](https://m.media-amazon.com/images/I/511w7IknyJL.jpg) [**Rislone 4720 Cat Complete Fuel Exhaust and Emissions System Cleaner 16.9 oz. | Cleans Catalytic Converter Reduces Emissions & Saves Gas**](https://www.amazon.com/dp/B08SPVQJ6J)

Rislone$24.304.1★1,2881%—flat

**~~Showing 15 of 19 — show all ~~**

## **Product shelf**

All 19 tracked products in this niche.

Top sellersNewestTrending

[![Liqui Moly Catalytic System Clean 300 ml 7110. Cleans The Injection System and The Combustion Chamber.](https://m.media-amazon.com/images/I/41cEqZoV8jL.jpg)**Liqui Moly Catalytic System Clean 300 ml 7110. Cleans The Injection System and The Combustion Chamber.** Liqui Moly**$18.25**4.4★3,736 reviews](https://www.amazon.com/dp/B07Z54MBQ3) [![Cataclean Fuel & Exhaust System Cleaner For Gasoline Engines Pass Emissions Tests Clear Check Engine Lights Restores Catalytic Converters and Cleans Fuel Systems 16oz - Pack of 2 (120019)](https://m.media-amazon.com/images/I/41nTWcYvkIL.jpg)**Cataclean Fuel & Exhaust System Cleaner For Gasoline Engines Pass Emissions Tests Clear Check Engine Lights Restores Catalytic Converters and Cleans Fuel Systems 16oz - Pack of 2 (120019)** Cataclean**$46.47**4.2★15,538 reviews](https://www.amazon.com/dp/B07N7RZ5ZV) [![Cataclean Fuel & Exhaust System Cleaner For Gasoline Engines Pass Emissions Tests Clear Check Engine Lights Restores Catalytic Converters and Cleans Fuel Systems 16oz (120007)](https://m.media-amazon.com/images/I/316798QcU5L.jpg)**Cataclean Fuel & Exhaust System Cleaner For Gasoline Engines Pass Emissions Tests Clear Check Engine Lights Restores Catalytic Converters and Cleans Fuel Systems 16oz (120007)** Cataclean**$27.09**4.2★15,538 reviews](https://www.amazon.com/dp/B002BVXM92) [![MotorPower Care Catalytic Converter Cleaner 2-Pack Pass Smog & Emissions Test Fix P0420/P0430 Check Engine Light | O2 Sensor & EGR Cleaner | Fuel Additive 8.45 fl oz Each](https://m.media-amazon.com/images/I/51sGHyaOPwL.jpg)**MotorPower Care Catalytic Converter Cleaner 2-Pack Pass Smog & Emissions Test Fix P0420/P0430 Check Engine Light | O2 Sensor & EGR Cleaner | Fuel Additive 8.45 fl oz Each** MotorPower Care**$29.97**4.2★889 reviews](https://www.amazon.com/dp/B0CDFTF8NK) [![MotorPower Care Catalytic Converter Cleaner Pass Emissions Test & Fix P0420 | Cleans O2 Sensor EGR Valve & Exhaust System | Fuel Additive for Gas & Hybrid Engines 8.45 fl oz](https://m.media-amazon.com/images/I/418wIr2yIDL.jpg)**MotorPower Care Catalytic Converter Cleaner Pass Emissions Test & Fix P0420 | Cleans O2 Sensor EGR Valve & Exhaust System | Fuel Additive for Gas & Hybrid Engines 8.45 fl oz** MotorPower Care**$16.91**4.1★1,055 reviews](https://www.amazon.com/dp/B07DCYT2F7) [![Cataclean (120007-2PK) Fuel and Exhaust System Cleaner - 16 fl. oz. (Pack of 2)](https://m.media-amazon.com/images/I/41vx05BlpbL.jpg)**Cataclean (120007-2PK) Fuel and Exhaust System Cleaner - 16 fl. oz. (Pack of 2)** Cataclean**$46.47**4.3★1,083 reviews](https://www.amazon.com/dp/B00MXF4N8U) [![Dura Lube Severe Catalytic and Exhaust Treatment Cleaner Fuel Additive 16 fl. oz. (PN: HL-402409 PDQ3)](https://m.media-amazon.com/images/I/415x1AcQ5TL.jpg)**Dura Lube Severe Catalytic and Exhaust Treatment Cleaner Fuel Additive 16 fl. oz. (PN: HL-402409 PDQ3)** DURA LUBE**$18.10**4.1★6,232 reviews](https://www.amazon.com/dp/B07HB7YVFG) [![Cataclean Fuel & Exhaust System Cleaner For Gasoline Engines Pass Emissions Tests Clear Check Engine Lights Restores Catalytic Converters and Cleans Fuel Systems 3L (120018CAT)](https://m.media-amazon.com/images/I/41w96XAsjdL.jpg)**Cataclean Fuel & Exhaust System Cleaner For Gasoline Engines Pass Emissions Tests Clear Check Engine Lights Restores Catalytic Converters and Cleans Fuel Systems 3L (120018CAT)** Cataclean**$76.77**4.2★15,538 reviews](https://www.amazon.com/dp/B0739TGHW8)

## **Reviews**

What buyers praise and complain about, mined from review topics.

### **What buyers love **

**Efficiency**27%

*“Effective”*

**Quality-Overall**14%

*“Quality Car Product”*

**Ease Of Use**9%

*“Ease of use”*

**Fuel Efficiency**9%

*“gets great gas mileage”*

**Ease Of Cleaning**8%

*“Keeps everything clean”*

**Value For Money**7%

*“Great value”*

**Advertised Vs Actual Product**7%

*“exactly as advertised”*

**Functionality-Overall**3%

*“Try it, it may do the job”*

**Instructions/User Manual/Troubleshooting**3%

*“followed instructions exactly”*

**Maintenance And Repair**2%

*“simple enough for routine maintenance use”*

### **What buyers complain about **

**Functionality-Overall**45%

*“No perceived difference in performance”*

**Value For Money**8%

*“It was expensive”*

**Advertised Vs Actual Product**4%

*“Didn't work as advertised”*

**Leak-Proof**4%

*“Damaged and Leaked after the delivered”*

**Compatibility-Overall**3%

*“Didn't work for my on my 17 hyundai accent with 90k on it”*

**Maintenance And Repair**3%

*“won't fix”*

**Sensor**3%

*“upstream right O2 sensor output weak”*

**Durability**3%

*“Light went off for a tank or 2 and then came back on”*

**Fuel Efficiency**2%

*“My gas mileage didn't improve by even a fraction of a mile per gallon”*

**Ease Of Cleaning**2%

*“see no sign at all of any cleaning being done at all”*

#### **Top return reasons**- Leak-Proof23% - Functionality-Overall18% - Advertised Vs Actual Product13% - Value For Money10% - Compatibility-Overall8% - Defective Material/Parts6% - Fuel Efficiency3% - Maintenance And Repair2% - Product Condition2% - Instructions/User Manual/Troubleshooting2%