Fuel Injector Cleaner
a concentrated shelf (top 5 take 91% of clicks) — Fuel Injector Cleaner doesn't clear our bar today.
Flapen Score
Ranks 768 of 811 Automotive niches · −15 vs the category median of 49
Is Fuel Injector Cleaner profitable on Amazon?
According to Flapen's Amazon United Kingdom niche tracking, Fuel Injector Cleaner is a £98K/yr Amazon United Kingdom market (80K searches/yr). The top 5 brands hold 97% of demand. Verdict: Skip it — 34/100.
Fuel Injector Cleaner: the Amazon niche in one read
Everything a seller checks before entering, in three answers.
Is the demand real?
Not really. Search demand moved -11.1% over the last 90 days and 10.2% of searches end in a purchase.
£98K
revenue / yr
Who owns the niche?
The top 5 brands hold 97% of demand, so 3% of the market is open.
3%
open market share
Is there a way in?
Listing quality. The average product page scores 0/100 on content standards. Incumbents average 4.7★ — the gap to enter on.
0/100
page quality · 8 products
Top Fuel Injector Cleaner products & what they sell for
Every tracked product — its share of the shelf, its review moat, and what it sells for.
Top sellers
by 90-day click share
LIQUI MOLY Pro-Line Engine Flush | 500 ml | Oil additive | SKU: 2427
- Price
- £8.44
- Rating
- 4.7/5
- Reviews
- 14,367
- Age
- 14y ago
Wynns Engine Oil Flush Cleans Inside Engine & Removes Harmful Deposits 425ml
- Price
- £5.21
- Rating
- 4.7/5
- Reviews
- 1,173
- Age
- 18y ago
STP GST62450EN06 Engine Flush for Petrol & Diesel Engines 450 ml
- Price
- £5.11
- Rating
- 4.6/5
- Reviews
- 2,047
- Age
- 13y ago
LIQUI MOLY Engine Flush 300ml Oil Additive SKU: 2678
- Price
- £7.05
- Rating
- 4.7/5
- Reviews
- 2,313
- Age
- 10y 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 473 ml / 16 US Oz
- Price
- £16.83
- Rating
- 4.9/5
- Reviews
- 227
- Age
- 6mo ago
Trending
90-day click momentumTRIAX Pro Engine Flush Oil-Based Deep Clean Motor Oil Flush Removes Sludge & Carbon - Non-Solvent - Safe for Engine Seals & Injectors - Professional Shop Grade 473 ml / 16 US Oz
- Price
- £16.83
- Rating
- 4.9/5
- Reviews
- 227
- Age
- 6mo ago
Wynns Commercial Vehicle Oil System Flush - Deep Engine Cleaner - Removes Sludge & Deposits - Turbo Safe - For All Engine Types - Synthetic & Mineral Oil Compatible - 1L
- Price
- £15.34
- Rating
- 4.8/5
- Reviews
- 9
- Age
- 1y ago
Wynns Engine Oil Flush Cleans Inside Engine & Removes Harmful Deposits 425ml
- Price
- £5.21
- Rating
- 4.7/5
- Reviews
- 1,173
- Age
- 18y ago
STP GST62450EN06 Engine Flush for Petrol & Diesel Engines 450 ml
- Price
- £5.11
- Rating
- 4.6/5
- Reviews
- 2,047
- Age
- 13y ago
LIQUI MOLY Engine Flush 300ml Oil Additive SKU: 2678
- Price
- £7.05
- Rating
- 4.7/5
- Reviews
- 2,313
- Age
- 10y ago
Newest
by launch dateTRIAX Pro Engine Flush Oil-Based Deep Clean Motor Oil Flush Removes Sludge & Carbon - Non-Solvent - Safe for Engine Seals & Injectors - Professional Shop Grade 473 ml / 16 US Oz
- Price
- £16.83
- Rating
- 4.9/5
- Reviews
- 227
- Age
- 6mo ago
Wynns Commercial Vehicle Oil System Flush - Deep Engine Cleaner - Removes Sludge & Deposits - Turbo Safe - For All Engine Types - Synthetic & Mineral Oil Compatible - 1L
- Price
- £15.34
- Rating
- 4.8/5
- Reviews
- 9
- Age
- 1y ago
LIQUI MOLY Engine Flush 300ml Oil Additive SKU: 2678
- Price
- £7.05
- Rating
- 4.7/5
- Reviews
- 2,313
- Age
- 10y ago
Carlube Flushing Oil SAE 20 4.55 L
- Price
- £20.85
- Rating
- 4.8/5
- Reviews
- 99
- Age
- 13y ago
STP GST62450EN06 Engine Flush for Petrol & Diesel Engines 450 ml
- Price
- £5.11
- Rating
- 4.6/5
- Reviews
- 2,047
- Age
- 13y ago
Competition: brands, sellers & click share
The top 5 products capture 91% of clicks — a locked-up shelf that new listings rarely crack.
Brands
6 falling
Sellers
44
Top-5 brand share
97%
Top 20: 100%
Top-5 click share
91%
Top 20: 100%
Open market
0%
- Liqui Moly56%
- WYNNS19%
- STP15%
- TRIAX4%
- Wynn's3%
- Carlube3%
Fuel Injector Cleaner demand & seasonality
Weekly search volume, with the niche's key stats alongside.
No pronounced peak months · busiest ÷ quietest = 1.4×
Top Fuel Injector Cleaner search terms shoppers use
The exact queries shoppers type, with yearly volume, growth and conversion.
- engine flush37K/yr
- engine flush diesel12K/yr
- liqui moly engine flush11K/yr
- engine flush petrol5K/yr
- engine oil flush6K/yr
- diesel engine flush3K/yr
- oil flush3K/yr
- liquid moly engine flush3K/yr
What reviews say buyers love and hate about Fuel Injector Cleaner
What buyers mention most, as a share of all reviews.
What buyers love
88% of reviews“The product is great as have used before”
“Effective”
“Does the job as expected”
“Amazing stuff flushed my oil out no problem”
“Great value engine flush”
What buyers complain about
60% of reviews“have heard stories about leaks caused afterwards”
“a little pricey”
“not strong enough for a heavily varnished engine”
“The old oil was pretty black even though it was within service limits”
Fuel Injector Cleaner return rate & reasons
Why buyers send it back, as a share of all return requests.
0.6%
Return rate
3%
Fixable by listing
The "fixable" share counts expectation-mismatch reasons — size, look, advertised-vs-actual — that better copy and images address.
Common Fuel Injector Cleaner questions
The questions sellers ask about this niche, answered from the tracked metrics.
Related niches
Same-category niches scoring near this one — the next ones worth researching.
Best Flapen score
The highest-scoring niches we track right now, across every category.
