diesel injector cleaner
Skip itBrand-locked demand (top 5 brands take 98% of clicks) — this niche doesn't clear our bar today.
Returns
Incredible0.3%return rate — above 5% kills the launch gate
Conversion
Great9.9%search→purchase rate — share of searches ending in a sale
Market size
Good£282K£282K/yr · 335K searches
Review moat
Okay1,795.85avg incumbent reviews — the moat a new listing must climb
Price range
Okay£2.76–£20.93cheapest to priciest tracked listing — scored on the share inside $15–$100
Quality gap
Okay4.6★avg incumbent rating — lower means beatable quality
Avg price
Bad£8.51avg listing price — sweet spot $15–$100
Growth
Bad-4.3%90-day search growth — must beat 0% to launch
Competition
Bad73%top-5 click share — a locked-up shelf
Brand share
Bad98%top-5 brand share — brand-locked demand
According to Flapen's Amazon United Kingdom niche tracking, diesel injector cleaner is a £282K/yr Amazon United Kingdom market (335K searches/yr). The top 5 brands hold 98% of demand. Verdict: Skip it — 42/100.
Data updated Jul 18, 2026 · scored weekly · How we score niches
diesel injector cleaner market data
- Units sold / yr
- 30K–40K
- avg 2,000–2,500/product
- Revenue / yr
- £255K–£340K
- units × avg price
- Conversion rate
- 9.9%
- Avg BSR
- #19
- Page quality
- 0%
- Prime
- 85%
- Sponsored
- 77%
- Out of stock
- 0.0%
- Avg brand age
- 71 months
- Avg seller age
- 180 days
Competition & brand share
The top 5 products capture 73% of clicks — a locked-up shelf that new listings rarely crack.Brands
6 falling
Sellers
66
Top-5 brand share
98%
Top 20: 100%
Top-5 click share
73%
Top 20: 100%
Open market
0%
- STP42%
- Redex39%
- Liqui Moly7%
- Archoil6%
- Carlube5%
- WOL WORLD OF LUBRICANT2%
- Open — no brand owns it (0%)
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — -4.3% search growth over the last 90 days.No pronounced peak months · busiest ÷ quietest = 1.3×
Top diesel injector cleaner search terms
- diesel injector cleaner99K/yr
- diesel additive44K/yr
- redex diesel fuel system cleaner42K/yr
- fuel systems10K/yr
- diesel cleaner29K/yr
- diesel fuel system cleaner14K/yr
- diesel fuel additive14K/yr
- stp ultra 5 in 1 fuel system cleaner diesel8K/yr
- diesel engine cleaner12K/yr
- diesel system cleaner11K/yr
Top diesel injector cleaner products on Amazon
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
All 13 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Redex Diesel Fuel System Cleaner 250ml Diesel Additives To Remove Harmful Emissions Maximise Performance & Increase Fuel Economy Fuel Additives For Diesel Engines Suitable For Hybrids
Redex£2.944.6★3,181 rev
STP Ultra 5 in 1 Diesel Fuel System Cleaner 400ml Restores Power and Protects your Engine Enhances Fuel Economy Mechanical Car Cleaning Products Concentrated Cleaning Formula Made in the UK
STP£9.684.6★3,775 rev
STP Diesel Fuel Additive Treatment Bundle Includes Diesel Injector Cleaner and Ultra 5-in-1 Diesel System Cleaner Cleans Injectors and Restores Performance For A Smoother Engine Made in the UK
STP£13.254.6★447 rev
Archoil AR6900-D Max Advanced Diesel Additive Concentrate 1L Treats 1 000L of Fuel Diesel Fuel Injector Cleaner DPF Filter EGR Valve Turbo Cleaner Super Diesel Converter. (1Litre)
Archoil£20.934.6★1,788 rev
LIQUI MOLY Speed Tec Diesel | 250 ml | Diesel additive | SKU: 3722 k.A.
Liqui Moly£8.494.6★2,299 rev
Newest
by launch dateSTP Diesel Fuel Additive Treatment Bundle Includes Diesel Injector Cleaner and Ultra 5-in-1 Diesel System Cleaner Cleans Injectors and Restores Performance For A Smoother Engine Made in the UK
STP£13.25447 rev
WOL Diesel Additive Injector Cleaner Liqui Moly Diesel Engine Purge 500ml - Fuel System Cleaner DPF Diesel Cleaner 1811 Smooth Engine Running (2 UNIT)
WOL WORLD OF LUBRICANT£14.87222 rev
Redex Diesel Fuel System Cleaner Diesel Additives To Remove Harmful Deposits Maximise Performance & Increase Fuel Economy Fuel Additives For Diesel Engines One Shot 90ml
Redex£2.76266 rev
STP Diesel High Milage Injector Cleaner 200 ml Cleans and Protects your Engine for 300 miles Enhances Fuel Economy Mechanical Car Cleaning Products Concentrated Cleaning Formula Made in the UK
STP£4.881,524 rev
Redex DPF Cleaner Diesel Diesel Particulate Filter Cleaner 250 ml
Redex£5.343,911 rev
Trending
90-day click momentumWOL Diesel Additive Injector Cleaner Liqui Moly Diesel Engine Purge 500ml - Fuel System Cleaner DPF Diesel Cleaner 1811 Smooth Engine Running (2 UNIT)
WOL WORLD OF LUBRICANT£14.874.6★
STP Diesel Injector Cleaner 200 ml Restores Power and Protects your Engine Enhances Fuel Economy Mechanical Car Cleaning Products Concentrated Cleaning Formula Made in the UK
STP£4.554.5★
Carlube QID300 Diesel Injector Cleaner 300ml regular
Carlube£3.174.4★
Redex Diesel Fuel System Cleaner 250ml Diesel Additives To Remove Harmful Emissions Maximise Performance & Increase Fuel Economy Fuel Additives For Diesel Engines Suitable For Hybrids
Redex£2.944.6★
Archoil AR6900-D Max Advanced Diesel Additive Concentrate 1L Treats 1 000L of Fuel Diesel Fuel Injector Cleaner DPF Filter EGR Valve Turbo Cleaner Super Diesel Converter. (1Litre)
Archoil£20.934.6★
What buyers say about diesel injector cleaner
What buyers praise and complain about, mined from review topics.What buyers love
“Its a generally well maintained vehicle”
“Effective”
“Great value for money”
“Works as Advertised”
“Improves fuel consumption”
“Good cleaning”
“Easy to use”
“Perfect diesel additive”
“Does it work”
“Much quieter and smoother idle”
What buyers complain about
“it went up in price”
“it doesn't smell like previous injector cleaners I've bought in the past”
“Awful messed up my fuel system”
“didn't last”
“the attachments don't fit eith a liquid tight seal so it leaks when you pour it ir when you try to measure the fluid before putting it into your tank”
“Not working as per claims”
“I have had consistent problems over the past three years with a clogged filter on my diesel Alfa Guilietta 2.0 which has ended up with the engine shutting down to its restricted speed mode”
“as it won't get the bottle nozzle into the fuelling line -”
“It's not compatible with a Ford Transit because of the anti siphon system”
“The main reason being as a severely clogged/carbonated engine may react badly to having all its clogged arteries unclogged in quick succession”
Top return reasons
Common questions
- Is diesel injector cleaner profitable to sell on Amazon United Kingdom?
- The niche generates £282K/yr across 13 tracked products. 90-day search growth is -4.3%. Flapen's verdict: Skip it (42/100).
- How competitive is the diesel injector cleaner niche?
- 6 brands and 66 sellers compete. The top 5 products take 73% of clicks and top 5 brands hold 98% of demand.
- What do buyers complain about in diesel injector cleaner?
- Top complaints mined from reviews: Value For Money, Smell, Fuel Efficiency. The return rate is 0.3%.
- When does demand for diesel injector cleaner peak?
- Demand is steady year-round — the busiest month runs 1.3× the quietest.
- What does it cost to enter the diesel injector cleaner niche?
- Listings span £2.76–£20.93; the average listing price is £8.51 (sweet spot $15–$100). The average incumbent carries 1,796 reviews — the moat a new listing must climb.