Is engine oil leak detection kit profitable to sell on Amazon United States?

The niche generates $189K/yr across 34 tracked products. 5 of 5 products launched in the last 360 days are still selling. 90-day search growth is -3.7%. Flapen's verdict: Worth a look (56/100).

How competitive is the engine oil leak detection kit niche?

26 brands and 41 sellers compete. The top 5 products take 42% of clicks and top 5 brands hold 60% of demand.

What do buyers complain about in engine oil leak detection kit?

Top complaints mined from reviews: Brightness/Shine/Glow, Functionality-Overall, Quality-Overall. The return rate is 2.1%.

When does demand for engine oil leak detection kit peak?

Demand peaks in May–Jun–Jul; the busiest month runs 3.7× the quietest.

What does it cost to enter the engine oil leak detection kit niche?

Listings span $6.32–$128.47; the average listing price is $23.13 (sweet spot $15–$100). The average incumbent carries 7,080 reviews — the moat a new listing must climb.

engine oil leak detection kit

Worth a look

Shows a sweet-spot price point ($23.13 avg), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.

Avg price

Incredible$23.13

avg listing price — sweet spot $15–$100

Conversion

Great9.4%

search→purchase rate — share of searches ending in a sale

Brand share

Great60%

top-5 brand share — no brand owns this niche

Returns

Good2.1%

return rate — above 5% kills the launch gate

Competition

Good42%

top-5 click share — leaders hold, buyers still browse

Price range

Good$6.32–$128.47

cheapest to priciest tracked listing — scored on the share inside $15–$100

Quality gap

Okay4.5★

avg incumbent rating — lower means beatable quality

Market size

Okay$189K

$189K/yr · 87K searches

Growth

Bad-3.7%

90-day search growth — must beat 0% to launch

Review moat

Bad7,080.44

avg incumbent reviews — the moat a new listing must climb

According to Flapen's Amazon United States niche tracking, engine oil leak detection kit is a $189K/yr Amazon United States market (87K searches/yr). The top 5 brands hold 60% of demand. Demand peaks in May–Jun–Jul. Verdict: Worth a look — 56/100.

Data updated Jul 24, 2026 · scored weekly · How we score niches

engine oil leak detection kit market data

Units sold / yr: 8K–10K; avg 100–250/product
Revenue / yr: $185K–$231K; units × avg price
Conversion rate: 9.4%
Avg BSR: #109
Page quality: 0%
Prime: 100%
Sponsored: 94%
Out of stock: 1.4%
Avg brand age: 44 months
Avg seller age: 177 days

Competition & brand share

The top 5 products take 42% of clicks — established leaders, but buyers still shop beyond them.

Brands

26 rising

Sellers

Top-5 brand share

60%

Top 20: 93%

Top-5 click share

42%

Top 20: 81%

Open market

36%

Vansky30%
MOWETOO14%
ESCO LITE6%
GLOSSDAY5%
OLIGHT5%
AdamStar5%

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — -3.7% search growth over the last 90 days.

Peak months: May, Jun, Jul · busiest ÷ quietest = 3.7×

Open Trend

Top engine oil leak detection kit search terms

flashlight with uv light combo12K/yr -19.1%2.4% conv.
flashlight with uv8K/yr +31.6%1.9% conv.
flashlight with black light combo4K/yr +66.9%4.7% conv.
ringworm light5K/yr +7.7%9.8% conv.
cat urine detector light3K/yr +11.8%15.3% conv.
germ detector6K/yr -19.3%1.3% conv.
uv flashlight for ac leak detection2K/yr +427.9%4.5% conv.
long wave uv light5K/yr -26.0%1.7% conv.
cat pee detector5K/yr -33.5%15.4% conv.
mini blacklight flashlight3K/yr +38.2%6.2% conv.

All search terms

Top engine oil leak detection kit 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.

Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 24 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

Vansky UV Flashlight Black Light 51 LED Blacklight Pet Urine Detector for Dog/Cat Urine Dry Stains Bed Bug Resin Curing Scorpions Finder

Vansky$12.254.4★74,022 rev

MOWETOO UV Flashlight Portable Blacklight Flashlight LED Torch with White and Ultraviolet Light Combo Black Light Pet Urine Detector for Dog Cat Pee ID Check AC Leak Bed Bug Rocks Resin

MOWETOO$11.034.5★7,885 rev

UV Light 395nm Blacklight Flashlight: Vansky 12 LED Black Light Mini Pet Urine Detection for Invisible Dog/Cat Dried Urine Stains on Carpet Scorpion Finder Resin Curing

Vansky$6.324.3★13,432 rev

ESCO LITE Black Light for Pet Urine Detection UV Flashlight 395nm Pet Urine Detector Light for Cat Pee and Dog Stains Carpets Floors

ESCO LITE$11.844.4★44,136 rev

UV Black light FlashlightRechargeable 2-in-1 LED White Light Flashlight and BlackLight 395nm Waterproof Zoomable Super Bright LED for Camping Hiking Pet Urine Detection Scorpion Detection

MOWETOO$12.254.6★314 rev

Newest

by launch date

Dokhbem 365nm UV Flashlight Rechargeable Black Light Flashlight with LCD Display Powerful Ultraviolet Lights for Pet Urine Detection Resin Curing Rockhounding Scorpion Uranium Glass A/C Leak

Dokhbem$21.80320 rev

6mo ago

UV Black light FlashlightRechargeable 2-in-1 LED White Light Flashlight and BlackLight 395nm Waterproof Zoomable Super Bright LED for Camping Hiking Pet Urine Detection Scorpion Detection

MOWETOO$12.25314 rev

8mo ago

OLIGHT ArkPro Lite Flat Pocket Flashlight Rechargeable Portable 1200 Lumens with White LED Red Light and UV Light Triple Sources for Pet Urine Detection Camping Emergency Working (Matte Black)

OLIGHT$70.66302 rev

8mo ago

HOTLIGH ZF8313 Rechargeable Flashlight Magnetic EDC Flashlight Rechargeable 2000 Lumens LED Flashlight with RGB and UV Lighting Source for Outdoor Car Repairing Fathers Day Dad Gifts

HOTLIGH$25.39758 rev

11mo ago

Black light UV Flashlight Rechargeable 395nm Mini Zoomable Blacklight Woods Lamp Portable But Powerful USB Ultraviolet Flashlights for Pet Urine Detection Home Scorpions Resin Curing Leak

MOWETOO$9.771,096 rev

1y ago

What buyers say about engine oil leak detection kit

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

What buyers love

Brightness/Shine/Glow35%

“Bright light”

Quality-Overall10%

“The build quality is excellent”

Value For Money8%

“Great Buy”

Advertised Vs Actual Product7%

“As advertised”

Charging5%

“holds a charge”

Ease Of Use4%

“Easy to hold and handle”

Size-Overall3%

“Good size”

Battery Life3%

“Battery lasts forever”

Strength3%

“Solid product”

Portability2%

“Very portable”

What buyers complain about

Brightness/Shine/Glow16%

“Not bright enough”

Functionality-Overall15%

“Barely works”

Quality-Overall6%

“Repeated quality control failures”

Battery Life6%

“Bad battery life”

Charging6%

“Never charged”

Durability5%

“Falls apart”

Value For Money4%

“Yes it's expensive”

Size-Overall4%

“This light is small”

Strength3%

“Too weak”

Advertised Vs Actual Product3%

“Not as advertised”

Top return reasons

Brightness/Shine/Glow25%

Functionality-Overall23%

Advertised Vs Actual Product11%

Size-Overall10%

Value For Money5%

Battery Inclusion4%

Defective Material/Parts4%

Bulb Flicker/Dimming/Color4%

Charging3%

Strength2%

Common questions

Is engine oil leak detection kit profitable to sell on Amazon United States?: The niche generates $189K/yr across 34 tracked products. 5 of 5 products launched in the last 360 days are still selling. 90-day search growth is -3.7%. Flapen's verdict: Worth a look (56/100).
How competitive is the engine oil leak detection kit niche?: 26 brands and 41 sellers compete. The top 5 products take 42% of clicks and top 5 brands hold 60% of demand.
What do buyers complain about in engine oil leak detection kit?: Top complaints mined from reviews: Brightness/Shine/Glow, Functionality-Overall, Quality-Overall. The return rate is 2.1%.
When does demand for engine oil leak detection kit peak?: Demand peaks in May–Jun–Jul; the busiest month runs 3.7× the quietest.
What does it cost to enter the engine oil leak detection kit niche?: Listings span $6.32–$128.47; the average listing price is $23.13 (sweet spot $15–$100). The average incumbent carries 7,080 reviews — the moat a new listing must climb.