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title: "505 cro engine cleaner — Niche Verdict: Skip it (44/100) | Amazon United States - Flapen"
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last_updated: "2026-07-09T22:53:26.337Z"
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  description: "a small market ($348K/yr) — 505 cro engine cleaner doesn't clear our bar today."
  "og:description": "a small market ($348K/yr) — 505 cro engine cleaner doesn't clear our bar today."
  "og:title": "505 cro engine cleaner — Niche Verdict: Skip it (44/100) | Amazon United States - Flapen"
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# **505 cro engine cleaner**

**Skip it****44/100 **

a small market ($348K/yr) — 505 cro engine cleaner doesn't clear our bar today.

**Market/yr**

**$348K**

**Growth (1y)**

**+163.8%**

**Products**

**17**

**Brands**

**10**

was 6 a year ago

**Sellers**

**88**

**Price range**

**$6.47–$87.87**

**Returns**

**0.7%**

**Rating**

**4.7★**

**Skip it**

Scored 44/100 across market size, growth, competition, quality gap, and returns.

Market sizeGrowthCompetitionQuality gapReturns

Market size

**17**

 ×0.30

Growth

**72**

 ×0.30

Competition

**26**

 ×0.20

Quality gap

**24**

 ×0.10

Returns

**94**

 ×0.10

## **Demand**

Weekly Amazon search volume, last 104 weeks — +163.8% year over year.

7K3KSpike '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 = 1.5×

## **Competition**

- Liqui Moly56% - Triax14% - MAATSEN13% - Gunk4% - Motul3% - XADO3% - Other (4 brands)7%

The top 5 products capture 72% of clicks — a locked-up shelf that new listings rarely crack. 10 brands and 88 sellers compete here.

**Brands**

**10 **▲rising

was 6 a year ago

**Sellers**

**88**

**Top 5 brand share**

**90%**

#ProductBrandPriceRatingReviewsClick shareTrend

1
![Liqui Moly Engine Flush Plus 300ml](https://m.media-amazon.com/images/I/31cVQp5YETS.jpg) [**Liqui Moly Engine Flush Plus 300ml**](https://www.amazon.com/dp/B0096Y6VBS)

Liqui Moly$17.704.7★6,44728%▲rising

2
![TRIAX Pro Engine Flush Oil-Based Deep Clean Motor Oil Flush Removes Sludge & Carbon | Non-Solvent | Safe for Engine Seals Injectors | Professional Shop Grade (16 oz - 473 ml)](https://m.media-amazon.com/images/I/41F6ZLfYEqL.jpg) [**TRIAX Pro Engine Flush Oil-Based Deep Clean Motor Oil Flush Removes Sludge & Carbon | Non-Solvent | Safe for Engine Seals Injectors | Professional Shop Grade (16 oz - 473 ml)**](https://www.amazon.com/dp/B0FM9PZ2WT)

Triax$13.654.8★23414%▲rising

3
![Liqui Moly motorspulung 500ML (2427) PRO LINE Engine Flush](https://m.media-amazon.com/images/I/413uluzMZEL.jpg) [**Liqui Moly motorspulung 500ML (2427) PRO LINE Engine Flush**](https://www.amazon.com/dp/B001CZSG94)

Liqui Moly$21.554.7★14,16513%▲rising

4
![Liquii Moly Pro-Line Engine Flush (500 ML) - 2 PACK](https://m.media-amazon.com/images/I/41+rNgeVPBL.jpg) [**Liquii Moly Pro-Line Engine Flush (500 ML) - 2 PACK**](https://www.amazon.com/dp/B0DF7PZ9FG)

MAATSEN$39.114.7★13611%▲rising

5
![Liqui Moly Pro-Line Engine Flush | 500 ml | Oil additive | SKU: 2037](https://m.media-amazon.com/images/I/31TzszYaY4L.jpg) [**Liqui Moly Pro-Line Engine Flush | 500 ml | Oil additive | SKU: 2037**](https://www.amazon.com/dp/B00CR3RXTO)

Liqui Moly$19.994.7★9,7106%▼falling

6
![Motor Flush 5 Min 32 fl oz (3 Pack)](https://m.media-amazon.com/images/I/41dl0HzdH6L.jpg) [**Motor Flush 5 Min 32 fl oz (3 Pack)**](https://www.amazon.com/dp/B01G00493M)

Gunk$23.114.6★904%—flat

7
![Liqui Moly MoS2 Anti-Friction Engine Treatment | 300 ml | Oil additive | SKU: 2009](https://m.media-amazon.com/images/I/31xUWiSNVHL.jpg) [**Liqui Moly MoS2 Anti-Friction Engine Treatment | 300 ml | Oil additive | SKU: 2009**](https://www.amazon.com/dp/B003U4O414)

Liqui Moly$9.704.7★7,0733%▼falling

8
![Motul Engine Clean | Oil Additive & Flush for Gasoline & Diesel Engines | Helps Remove Sludge & Improve Oil Flow | Supports Emission System Care & Engine Protection | 300ml](https://m.media-amazon.com/images/I/31AFJOgfnAL.jpg) [**Motul Engine Clean | Oil Additive & Flush for Gasoline & Diesel Engines | Helps Remove Sludge & Improve Oil Flow | Supports Emission System Care & Engine Protection | 300ml**](https://www.amazon.com/dp/B019C8TGGY)

Motul$18.404.7★1593%▲rising

9
![XADO Engine Oil System Cleaner with Anti-Carbon Effect - Removes Contamination & Engine Sludge - ATOMEX Total Flush Revitalizant (Bottle 250ml)](https://m.media-amazon.com/images/I/4182YTxdCPL.jpg) [**XADO Engine Oil System Cleaner with Anti-Carbon Effect - Removes Contamination & Engine Sludge - ATOMEX Total Flush Revitalizant (Bottle 250ml)**](https://www.amazon.com/dp/B0096CBI2M)

XADO$24.694.6★6003%—flat

10

![LIQUI MOLY Oil Additive Cera Tec 20002 Ceramic Wear & Tear Protection for Petrol & Diesel Engines Smoother Engine Performance Less Friction & Lower Fuel Consumption 300 ml](https://m.media-amazon.com/images/I/311w8nUBq7L.jpg) [**LIQUI MOLY Oil Additive Cera Tec 20002 Ceramic Wear & Tear Protection for Petrol & Diesel Engines Smoother Engine Performance Less Friction & Lower Fuel Consumption 300 ml**](https://www.amazon.com/dp/B001CZODH8)

Liqui Moly$28.704.8★33,7743%▲rising

11

![Liquii Moly Engine Flush (300 ML) - 2 PACK](https://m.media-amazon.com/images/I/41BVdBmmWtL.jpg) [**Liquii Moly Engine Flush (300 ML) - 2 PACK**](https://www.amazon.com/dp/B0DG941NK7)

MAATSEN$35.264.2★122%▲rising

12

![Liquii Moly Pro-Line Engine Flush (500 ML) - 3 PACK](https://m.media-amazon.com/images/I/41ycFhLLgUL.jpg) [**Liquii Moly Pro-Line Engine Flush (500 ML) - 3 PACK**](https://www.amazon.com/dp/B0DNTDF17Q)

Generic$51.034.9★572%▼falling

13

![Liquimoly 2037 Pro-Line Engine Flush 500 ml 6 Pack](https://m.media-amazon.com/images/I/41-Fd75gPSL.jpg) [**Liquimoly 2037 Pro-Line Engine Flush 500 ml 6 Pack**](https://www.amazon.com/dp/B01AAGKXXM)

Liqui Moly$87.874.7★1802%▲rising

14

![Rislone 4102 XTREME LUBE Maximum Performance Engine Treatment 16.9 oz.](https://m.media-amazon.com/images/I/41mbjirJkhL.jpg) [**Rislone 4102 XTREME LUBE Maximum Performance Engine Treatment 16.9 oz.**](https://www.amazon.com/dp/B0078661MK)

Rislone$6.474.6★1,9682%—flat

15

![Berryman 1216 Oil Change Flush 16-Ounce](https://m.media-amazon.com/images/I/41N2cwS8ByL.jpg) [**Berryman 1216 Oil Change Flush 16-Ounce**](https://www.amazon.com/dp/B0167O87OI)

Berryman$14.534.7★4242%▲rising

**~~Showing 15 of 17 — show all ~~**

## **Product shelf**

All 17 tracked products in this niche.

Top sellersNewestTrending

[![Liqui Moly Engine Flush Plus 300ml](https://m.media-amazon.com/images/I/31cVQp5YETS.jpg)**Liqui Moly Engine Flush Plus 300ml** Liqui Moly**$17.70**4.7★6,447 reviews](https://www.amazon.com/dp/B0096Y6VBS) [![TRIAX Pro Engine Flush Oil-Based Deep Clean Motor Oil Flush Removes Sludge & Carbon | Non-Solvent | Safe for Engine Seals Injectors | Professional Shop Grade (16 oz - 473 ml)](https://m.media-amazon.com/images/I/41F6ZLfYEqL.jpg)**TRIAX Pro Engine Flush Oil-Based Deep Clean Motor Oil Flush Removes Sludge & Carbon | Non-Solvent | Safe for Engine Seals Injectors | Professional Shop Grade (16 oz - 473 ml)** Triax**$13.65**4.8★234 reviews](https://www.amazon.com/dp/B0FM9PZ2WT) [![Liqui Moly motorspulung 500ML (2427) PRO LINE Engine Flush](https://m.media-amazon.com/images/I/413uluzMZEL.jpg)**Liqui Moly motorspulung 500ML (2427) PRO LINE Engine Flush** Liqui Moly**$21.55**4.7★14,165 reviews](https://www.amazon.com/dp/B001CZSG94) [![Liquii Moly Pro-Line Engine Flush (500 ML) - 2 PACK](https://m.media-amazon.com/images/I/41+rNgeVPBL.jpg)**Liquii Moly Pro-Line Engine Flush (500 ML) - 2 PACK** MAATSEN**$39.11**4.7★136 reviews](https://www.amazon.com/dp/B0DF7PZ9FG) [![Liqui Moly Pro-Line Engine Flush | 500 ml | Oil additive | SKU: 2037](https://m.media-amazon.com/images/I/31TzszYaY4L.jpg)**Liqui Moly Pro-Line Engine Flush | 500 ml | Oil additive | SKU: 2037** Liqui Moly**$19.99**4.7★9,710 reviews](https://www.amazon.com/dp/B00CR3RXTO) [![Motor Flush 5 Min 32 fl oz (3 Pack)](https://m.media-amazon.com/images/I/41dl0HzdH6L.jpg)**Motor Flush 5 Min 32 fl oz (3 Pack)** Gunk**$23.11**4.6★90 reviews](https://www.amazon.com/dp/B01G00493M) [![Liqui Moly MoS2 Anti-Friction Engine Treatment | 300 ml | Oil additive | SKU: 2009](https://m.media-amazon.com/images/I/31xUWiSNVHL.jpg)**Liqui Moly MoS2 Anti-Friction Engine Treatment | 300 ml | Oil additive | SKU: 2009** Liqui Moly**$9.70**4.7★7,073 reviews](https://www.amazon.com/dp/B003U4O414) [![Motul Engine Clean | Oil Additive & Flush for Gasoline & Diesel Engines | Helps Remove Sludge & Improve Oil Flow | Supports Emission System Care & Engine Protection | 300ml](https://m.media-amazon.com/images/I/31AFJOgfnAL.jpg)**Motul Engine Clean | Oil Additive & Flush for Gasoline & Diesel Engines | Helps Remove Sludge & Improve Oil Flow | Supports Emission System Care & Engine Protection | 300ml** Motul**$18.40**4.7★159 reviews](https://www.amazon.com/dp/B019C8TGGY)

## **Reviews**

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

### **What buyers love **

**Quality-Overall**20%

*“Excellent product”*

**Value For Money**10%

*“Good Value”*

**Fuel Efficiency**10%

*“Better gas mileage”*

**Efficiency**10%

*“Works as intended”*

**Lubrication**8%

*“Filled with Fresh oil and filter, and I also used some ProLube oil treatment, and have amazing oil pressure and have no issues anymore”*

**Noise Level**7%

*“quieter”*

**Advertised Vs Actual Product**6%

*“Product as advertised”*

**Ease Of Cleaning**5%

*“Clean and keep going”*

**Ease Of Use**4%

*“Easy to use”*

**Motor Power**4%

*“Keep that motor running”*

### **What buyers complain about **

**Noise Level**19%

*“It was very noisy lifter wise”*

**Lubrication**12%

*“Made my oil look like mud when i went to replace it”*

**Value For Money**8%

*“A little expensive”*

**Functionality-Overall**6%

*“This does not work at all”*

**Compatibility-Overall**5%

*“Did not work on my VW Tiguan”*

**Leak-Proof**4%

*“Leaking”*

**Compression**3%

*“I gained more compression on cylinders that were lacking compression”*

**Ease Of Cleaning**3%

*“It makes the oil look dirty”*

**Quality-Overall**2%

*“Bottled junk”*

**Fuel Efficiency**2%

*“expected gas milage increase”*

#### **Top return reasons**- Leak-Proof20% - Compatibility-Overall20% - Functionality-Overall12% - Advertised Vs Actual Product12% - Value For Money11% - Fuel Efficiency4% - Motor Issues4% - Product Condition3% - Defective Material/Parts3% - Lubrication1%