505 Cro Engine Cleaner
FailThe products selling today already average 4.7★, so 505 Cro Engine Cleaner is a Fail.
- Flapen Score
- 45 / 100Ranks 4,788 of 7,287 Automotive niches · −4 vs the category median of 4945
- Market size
- $348K/yr285K searches / yr
- 90-day growth
- +0.1%search demand this quarter
- Competition
- 72%top-5 click share · 10 brands · 88 sellers
Flapen Score
505 Cro Engine Cleaner against its category
The dotted line is the Automotive average. Past it, 505 Cro Engine Cleaner is stronger. Inside it, weaker.
Market
The 505 Cro Engine Cleaner market on Amazon at a glance
Shoppers on Amazon United States searched for 505 Cro Engine Cleaner 285K times last year and spent an estimated $348K. The top 5 brands take 90% of clicks. Flapen scores it 45 out of 100, a Fail.
01 · Demand
An estimated 4.8% of those searches ended in a purchase.
Shoppers searched for this 285K times in the last 12 months. That counts every search on Amazon United States for this niche's terms. An estimated 4.8% of those searches ended in a purchase. Searches in the last 90 days moved +0.1% against the 90 days before. Searches, conversion and average price together put the market at an estimated $348K a year.
- Searches, last 12 months
- 285K
- Growth, 90 days vs prior 90
- +0.1%
- Conversion, latest week
- 4.8%
- Market size, estimated
- $348Ka year
- Peak month
- March1.5× the quietest month
- Top search term
- engine flush83K searches a year
02 · Price
A sale here is worth $25.41.
Listings sell for $25.41 on average, from $6.47 to $87.87. Amazon reports units sold in ranges. This niche sold 15K to 20K a year. The average listing sells 1,250 to 1,500 of them. At $25.41 that is $32K to $38K a year per listing.
- Average price
- $25.41inside the $15 to $100 sweet spot
- Price range
- $6.47–$87.87
- Amazon United States median price
- $24.38across 115,062 niches
- Units sold a year
- 15K–20K
- Units per listing a year
- 1,250–1,500
- Revenue per listing a year
- $32K–$38K
- Returns
- 0.7%of orders · Amazon United States median 2.1%
03 · Entry bar
The bar here is reviews.
71% of listings pay for placement with sponsored ads. 94% ship with Prime. On an average day, 1.4% of listings are out of stock. The average listing ranks #182 within Oils & Fluids. It carries 4,673 reviews at 4.66 stars, so a new listing needs social proof before a better product.
- Sponsored listings
- 71%
- Prime listings
- 94%
- Out of stock, average day
- 1.4%
- Average rank
- #182in Oils & Fluids
- Average rating
- 4.66 starsAmazon United States average 4.42 stars
- Average reviews
- 4,673per listing
- Listings tracked
- 17
04 · Newcomers
1 of last year's 1 launches cleared the first-year sales bar.
1 products launched here in the last 12 months. 1 of them cleared the first-year sales bar, our mark for a successful launch. The brands on the shelf have sold for 93 months on average, so the names here are established.
- Launched, last 12 months
- 1
- Successful launches
- 1Amazon's first-year sales bar
- Average brand age
- 93 months
Products
Top 505 Cro Engine Cleaner products & what they sell for
The products selling here, as shoppers see them on Amazon. Shelf share and sales are our estimates.
Prices and ratings read from Amazon on Jul 9, 2026. The live listing can differ.
Top sellers
by estimated 90-day click share
Liqui Moly Engine Flush Plus 300ml
- Price
- $17.70
- Rating
- 4.7/5
- Reviews
- 6,447
- Age
- 11y ago

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)
- Price
- $13.65
- Rating
- 4.8/5
- Reviews
- 234
- Age
- 11mo ago

Liqui Moly motorspulung 500ML (2427) PRO LINE Engine Flush
- Price
- $21.55
- Rating
- 4.7/5
- Reviews
- 14,165
- Age
- 13y ago

Liquii Moly Pro-Line Engine Flush (500 ML) - 2 PACK
- Price
- $39.11
- Rating
- 4.7/5
- Reviews
- 136
- Age
- 1y ago

Liqui Moly Pro-Line Engine Flush | 500 ml | Oil additive | SKU: 2037
- Price
- $19.99
- Rating
- 4.7/5
- Reviews
- 9,710
- Age
- 14y ago
Trending
estimated 90-day click momentum
Liquii Moly Engine Flush (300 ML) - 2 PACK
- Price
- $35.26
- Rating
- 4.2/5
- Reviews
- 12
- Age
- 1y ago

Berryman 1216 Oil Change Flush 16-Ounce
- Price
- $14.53
- Rating
- 4.7/5
- Reviews
- 424
- Age
- 10y ago

Liqui Moly motorspulung 500ML (2427) PRO LINE Engine Flush
- Price
- $21.55
- Rating
- 4.7/5
- Reviews
- 14,165
- Age
- 13y ago

Liquii Moly Pro-Line Engine Flush (500 ML) - 2 PACK
- Price
- $39.11
- Rating
- 4.7/5
- Reviews
- 136
- Age
- 1y ago

Motul Engine Clean | Oil Additive & Flush for Gasoline & Diesel Engines | Helps Remove Sludge & Improve Oil Flow | Supports Emission System Care & Engine Protection | 300ml
- Price
- $18.40
- Rating
- 4.7/5
- Reviews
- 159
- Age
- 10y ago
Newest
by launch date
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)
- Price
- $13.65
- Rating
- 4.8/5
- Reviews
- 234
- Age
- 11mo ago

Liquii Moly Pro-Line Engine Flush (500 ML) - 3 PACK
- Price
- $51.03
- Rating
- 4.9/5
- Reviews
- 57
- Age
- 1y ago

Liquii Moly Engine Flush (300 ML) - 2 PACK
- Price
- $35.26
- Rating
- 4.2/5
- Reviews
- 12
- Age
- 1y ago

Liquii Moly Pro-Line Engine Flush (500 ML) - 2 PACK
- Price
- $39.11
- Rating
- 4.7/5
- Reviews
- 136
- Age
- 1y ago

BlueDevil Products Motor Flush - 1 Quart
- Price
- $10.39
- Rating
- 4.5/5
- Reviews
- 128
- Age
- 2y ago
Competition
Competition: brands, sellers & click share
The top 5 products take an estimated 72% of clicks. A locked shelf that new listings rarely crack.
Brands
10 rising
Sellers
88
Est. top-5 brand share
90%
Top 20: 100%
Est. top-5 click share
72%
Top 20: 100%
Open market
7%
- Liqui Moly56%
- Triax14%
- MAATSEN13%
- Gunk4%
- Motul3%
- XADO3%
- Open — no brand owns it (4 brands, 7%)
Demand
505 Cro Engine Cleaner search demand
Weekly searches over the year, seasonality beneath. Pick a range.
No pronounced peak months · busiest ÷ quietest = 1.5×
Search terms
Top 505 Cro Engine Cleaner search terms shoppers use
The exact words shoppers type, with estimated yearly volume, growth, and conversion.
- engine flush83K/yr
- liqui moly engine flush60K/yr
- motor flush19K/yr
- engine flush liqui moly14K/yr
- liquid molly engine flush13K/yr
- engine oil flush14K/yr
- liquid moly engine flush12K/yr
- engine oil cleaner9K/yr
- oil flush7K/yr
- amsoil engine flush7K/yr
Reviews and returns
What reviews say buyers love and hate about 505 Cro Engine Cleaner
We read the reviews and the return reasons for every product selling here.
“It was very noisy lifter wise”
Every topic
Every topic buyers talk about, one row each.
Red shows the share of negative reviews and green the share of positive reviews, biggest topic first. Open a row to read what they wrote.
17 topics
Keep looking
Related niches
Niches in the same category that score near this one. Research these next.
Best Flapen score
The highest-scoring niches we track right now, across every category.
FAQ
Common 505 Cro Engine Cleaner questions
Answered from the same tracked data.
Figures on this page are estimates modeled from public Amazon pages and third-party keyword data. Amazon does not supply them, and no connected seller's data is used. How we handle Amazon data









