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56

onan 5500 oil filter

Worth a look

Shows low returns (1.0%), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.

Market size 14Growth 58Conversion 88Competition 21Returns 95Price range 84Avg price 93Brand share 47Review moat 83Quality gap 60

Returns

Incredible1.0%

return rate — above 6% kills the launch gate

Avg price

Great$22.02

avg listing price — sweet spot $15–$100

Conversion

Great10.2%

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

Price range

Great$9.69–$48.79

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

Review moat

Great336.08

avg incumbent reviews — the moat a new listing must climb

Quality gap

Good4.4★

avg incumbent rating — lower means beatable quality

Growth

Good+32.4%

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

Brand share

Okay77%

top-5 brand share — brands hold most of the demand

Competition

Bad75%

top-5 click share — a locked-up shelf

Market size

Bad$57K

$57K/yr · 26K searches

Competition

The top 5 products capture 75% of clicks — a locked-up shelf that new listings rarely crack.

Brands

11 falling

Sellers

47

Top-5 brand share

77%

Open market

17%

  • Cummins40%
  • RADHLBNIU13%
  • iFJF9%
  • Kanimp8%
  • ATRACYPART7%
  • AULDAY6%
  • Open — no brand owns it (5 brands, 17%)

Product shelf

Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.

0%10%$6K20%$11K30%$17K40%$23K1101001K10K Reviews — right = deep review moat Market share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 12 tracked products in this niche — three views at once, no toggling.

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — +32.4% search growth over the last 90 days.
800600Spike '25Spike '26SepDecMarJunAugNovMarMay

Peak months: Apr, May, Jun, Jul · busiest ÷ quietest = 2.7×

Reviews

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

What buyers love

Size-Overall28%

“Everything fit perfectly”

Quality-Overall19%

“Good quality and arrived 1 day ahead of time”

Value For Money17%

“Great value for the price”

Advertised Vs Actual Product14%

“Worked as advertised, no issues”

Filtration7%

“The oil filters match the oh nan generator exactly”

Ease Of Use6%

“Convenient, Practical, and Worth Having”

Correct Contents4%

“Perfect kit”

Maintenance And Repair2%

“It's a complete kit with everything you need to do routine maintenance”

What buyers complain about

Filtration44%

“Dont trust the fuel filter”

Size-Overall39%

“does not fit the one included with the kit”

Top return reasons

Size-Overall43%
Filtration14%
Compatibility-Overall11%
Defective Material/Parts9%
Advertised Vs Actual Product8%
Value For Money4%
Leak-Proof4%
Functionality-Overall4%
Quality-Overall2%
Rusts/Corrodes1%