--- title: "engine carbon cleaner — Niche Verdict: Skip it (42/100) | Amazon United States - Flapen" canonical_url: "https://flapen.com/amazon/research/us/automotive/engine-carbon-cleaner" last_updated: "2026-07-09T23:47:46.712Z" locale: en meta: description: "a small market ($142K/yr) — engine carbon cleaner doesn't clear our bar today." "og:description": "a small market ($142K/yr) — engine carbon cleaner doesn't clear our bar today." "og:title": "engine carbon cleaner — Niche Verdict: Skip it (42/100) | Amazon United States - Flapen" --- Back to Flapen home # **engine carbon cleaner** **Skip it****42/100 ** a small market ($142K/yr) — engine carbon cleaner doesn't clear our bar today. **Market/yr** **$142K** **Growth (1y)** **+146.7%** **Products** **16** **Brands** **6** was 10 a year ago **Sellers** **93** **Price range** **$9.87–$93.58** **Returns** **0.6%** **Rating** **4.6★** **Skip it** Scored 42/100 across market size, growth, competition, quality gap, and returns. Market sizeGrowthCompetitionQuality gapReturns Market size **7** ×0.30 Growth **70** ×0.30 Competition **29** ×0.20 Quality gap **31** ×0.10 Returns **95** ×0.10 ## **Demand** Weekly Amazon search volume, last 101 weeks — +146.7% year over year. 3K2KSpike '24Spike '25Spike '26Aug '24Nov '24Mar '25Jul '25Oct '25Feb '26 ## **Seasonality** Monthly demand index across the year — 1.00 is average. JFMAMJJASOND Peak months: Oct, Nov · busiest ÷ quietest = 1.8× ## **Competition** - Bore Tech44% - Liqui Moly30% - Slip200017% - MotorPower Care5% - CRC2% - Triax2% The top 5 products capture 71% of clicks — a locked-up shelf that new listings rarely crack. 6 brands and 93 sellers compete here. **Brands** **6 **▼falling was 10 a year ago **Sellers** **93** **Top 5 brand share** **98%** #ProductBrandPriceRatingReviewsClick shareTrend 1 ![Bore Tech C4 Carbon Remover 4 oz](https://m.media-amazon.com/images/I/31FwbygMA7L.jpg) [**Bore Tech C4 Carbon Remover 4 oz**](https://www.amazon.com/dp/B0070ISQZG) Bore Tech$24.064.8★34532%▲rising 2 ![Liqui Moly Valve Clean | 150 ml | Petroladititive | SKU: 2001](https://m.media-amazon.com/images/I/41Kn3hB8rIL.jpg) [**Liqui Moly Valve Clean | 150 ml | Petroladititive | SKU: 2001**](https://www.amazon.com/dp/B003U4RS1M) Liqui Moly$9.874.7★4,28218%▼falling 3 ![Bore Tech BTCC-35016 C4 Carbon Remover 16 oz](https://m.media-amazon.com/images/I/31SOoNKb0oL.jpg) [**Bore Tech BTCC-35016 C4 Carbon Remover 16 oz**](https://www.amazon.com/dp/B0070IQRDO) Bore Tech$42.164.9★4279%▼falling 4 ![SLIP 2000 Carbon Killer - 15 oz.](https://m.media-amazon.com/images/I/414p0Ad5GJL.jpg) [**SLIP 2000 Carbon Killer - 15 oz.**](https://www.amazon.com/dp/B005AXSS0Q) Slip2000$21.424.4★7467%▼falling 5 ![SLIP 2000 Carbon Killer Bore Cleaner Removes Carbon Grease and Lead on Contact 4-Ounce](https://m.media-amazon.com/images/I/41LM6STOOuL.jpg) [**SLIP 2000 Carbon Killer Bore Cleaner Removes Carbon Grease and Lead on Contact 4-Ounce**](https://www.amazon.com/dp/B0064VN61Y) Slip2000$13.794.4★7466%▲rising 6 ![Liqui Moly (2001-12PK) Valve Clean - 150 ml (Pack of 12)](https://m.media-amazon.com/images/I/51IddYu02cL.jpg) [**Liqui Moly (2001-12PK) Valve Clean - 150 ml (Pack of 12)**](https://www.amazon.com/dp/B00G4UI1YM) Liqui Moly$93.584.7★4,2825%▲rising 7 ![MotorPower Care Advanced Carbon Cleaner for Gasoline & Diesel Engines - Removes Carbon Deposits Improves Performance & Efficiency - Safe for Use on Engine Components](https://m.media-amazon.com/images/I/41J5zyoIFjL.jpg) [**MotorPower Care Advanced Carbon Cleaner for Gasoline & Diesel Engines - Removes Carbon Deposits Improves Performance & Efficiency - Safe for Use on Engine Components**](https://www.amazon.com/dp/B08592CW6X) MotorPower Care$25.054.3★475%▲rising 8 ![LIQUI MOLY - 150mL Valve Clean (2001)](https://m.media-amazon.com/images/I/61tWM5YTzlL.jpg) [**LIQUI MOLY - 150mL Valve Clean (2001)**](https://www.amazon.com/dp/B0CDN8JKTQ) Liqui Moly$15.750.0★03%▲rising 9 ![Slip2000 Carbon Killer Bore Cleaner Solvent Removes Carbon Grease and Lead on Contact Makes Cleaning Internal Metal Parts Easy 32 Ounces](https://m.media-amazon.com/images/I/31EDK7-z8LL.jpg) [**Slip2000 Carbon Killer Bore Cleaner Solvent Removes Carbon Grease and Lead on Contact Makes Cleaning Internal Metal Parts Easy 32 Ounces**](https://www.amazon.com/dp/B0CW7SPT1F) Slip2000$37.314.1★513%▼falling 10 ![CRC GDI IVD Intake Valve & Turbo Cleaner](https://m.media-amazon.com/images/I/41LcBjtc6sL.jpg) [**CRC GDI IVD Intake Valve & Turbo Cleaner**](https://www.amazon.com/dp/B00PHNQKR2) CRC$18.354.6★1,8022%—flat 11 ![LiquiMoly Liqui Moly Valve Clean Case of 4 IAS2001](https://m.media-amazon.com/images/I/31O9TamRQLL.jpg) [**LiquiMoly Liqui Moly Valve Clean Case of 4 IAS2001**](https://www.amazon.com/dp/B006M4HFRE) Liqui Moly$42.874.5★752%▲rising 12 ![SLIP 2000 725 Gun Cleaner and Degreaser Removes Deposits of Carbon Grease Grime All Purpose Gun Cleaner Trigger Spray Bottle 16 fl oz](https://m.media-amazon.com/images/I/31tt29jKqQL.jpg) [**SLIP 2000 725 Gun Cleaner and Degreaser Removes Deposits of Carbon Grease Grime All Purpose Gun Cleaner Trigger Spray Bottle 16 fl oz**](https://www.amazon.com/dp/B0064VRRAU) Slip2000$23.854.7★7722%▲rising 13 ![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★3,7362%—flat 14 ![Bore Tech Eliminator Bore Cleaner 4 oz](https://m.media-amazon.com/images/I/21EJJsR+A8L.jpg) [**Bore Tech Eliminator Bore Cleaner 4 oz**](https://www.amazon.com/dp/B0070IS08O) Bore Tech$23.434.7★3052%—flat 15 ![Bore Tech Cu+2 Copper 4 oz](https://m.media-amazon.com/images/I/31oFGqyboOL.jpg) [**Bore Tech Cu+2 Copper 4 oz**](https://www.amazon.com/dp/B0070IRZFI) Bore Tech$23.694.8★4702%▼falling **~~Showing 15 of 16 — show all ~~** ## **Product shelf** All 16 tracked products in this niche. Top sellersNewestTrending [![Bore Tech C4 Carbon Remover 4 oz](https://m.media-amazon.com/images/I/31FwbygMA7L.jpg)**Bore Tech C4 Carbon Remover 4 oz** Bore Tech**$24.06**4.8★345 reviews](https://www.amazon.com/dp/B0070ISQZG) [![Liqui Moly Valve Clean | 150 ml | Petroladititive | SKU: 2001](https://m.media-amazon.com/images/I/41Kn3hB8rIL.jpg)**Liqui Moly Valve Clean | 150 ml | Petroladititive | SKU: 2001** Liqui Moly**$9.87**4.7★4,282 reviews](https://www.amazon.com/dp/B003U4RS1M) [![Bore Tech BTCC-35016 C4 Carbon Remover 16 oz](https://m.media-amazon.com/images/I/31SOoNKb0oL.jpg)**Bore Tech BTCC-35016 C4 Carbon Remover 16 oz** Bore Tech**$42.16**4.9★427 reviews](https://www.amazon.com/dp/B0070IQRDO) [![SLIP 2000 Carbon Killer - 15 oz.](https://m.media-amazon.com/images/I/414p0Ad5GJL.jpg)**SLIP 2000 Carbon Killer - 15 oz.** Slip2000**$21.42**4.4★746 reviews](https://www.amazon.com/dp/B005AXSS0Q) [![SLIP 2000 Carbon Killer Bore Cleaner Removes Carbon Grease and Lead on Contact 4-Ounce](https://m.media-amazon.com/images/I/41LM6STOOuL.jpg)**SLIP 2000 Carbon Killer Bore Cleaner Removes Carbon Grease and Lead on Contact 4-Ounce** Slip2000**$13.79**4.4★746 reviews](https://www.amazon.com/dp/B0064VN61Y) [![Liqui Moly (2001-12PK) Valve Clean - 150 ml (Pack of 12)](https://m.media-amazon.com/images/I/51IddYu02cL.jpg)**Liqui Moly (2001-12PK) Valve Clean - 150 ml (Pack of 12)** Liqui Moly**$93.58**4.7★4,282 reviews](https://www.amazon.com/dp/B00G4UI1YM) [![MotorPower Care Advanced Carbon Cleaner for Gasoline & Diesel Engines - Removes Carbon Deposits Improves Performance & Efficiency - Safe for Use on Engine Components](https://m.media-amazon.com/images/I/41J5zyoIFjL.jpg)**MotorPower Care Advanced Carbon Cleaner for Gasoline & Diesel Engines - Removes Carbon Deposits Improves Performance & Efficiency - Safe for Use on Engine Components** MotorPower Care**$25.05**4.3★47 reviews](https://www.amazon.com/dp/B08592CW6X) [![LIQUI MOLY - 150mL Valve Clean (2001)](https://m.media-amazon.com/images/I/61tWM5YTzlL.jpg)**LIQUI MOLY - 150mL Valve Clean (2001)** Liqui Moly**$15.75**0.0★0 reviews](https://www.amazon.com/dp/B0CDN8JKTQ) ## **Reviews** What buyers praise and complain about, mined from review topics. ### **What buyers love ** **Efficiency**19% *“It works great”* **Quality-Overall**17% *“Excellent Product”* **Ease Of Cleaning**11% *“Best cleaner”* **Value For Money**9% *“Good price”* **Advertised Vs Actual Product**9% *“As advertised”* **Fuel Efficiency**5% *“gets great gas mileage”* **Ease Of Use**4% *“Easy to use”* **Smell**3% *“smells great”* **Lubrication**2% *“Filled with Fresh oil and filter, and I also used some ProLube oil treatment, and have amazing oil pressure and have no issues anymore”* **Carbon Footprint**2% *“Excellent bore safe carbon removed”* ### **What buyers complain about ** **Functionality-Overall**24% *“Did not work”* **Value For Money**11% *“it is expensive”* **Compatibility-Overall**7% *“Did not work for a 2002 Toyota sienna”* **Ease Of Use**5% *“Tough to open”* **Leak-Proof**4% *“The liquid got everywhere”* **Maintenance And Repair**4% *“still needs maintenance”* **Smell**3% *“Is also very stinky”* **Ease Of Cleaning**3% *“still not clean”* **Lubrication**3% *“I mistakenly used an oil addative to my engine”* **Quality-Overall**3% *“Their product is no good”* #### **Top return reasons**- Leak-Proof26% - Functionality-Overall15% - Advertised Vs Actual Product9% - Compatibility-Overall9% - Value For Money9% - Carbon Footprint6% - Defective Material/Parts5% - Size-Overall4% - Ease Of Cleaning2% - Instructions/User Manual/Troubleshooting2%