---
title: "oil filter adapter 1/2-28 — Niche Verdict: Skip it (41/100) | Amazon United States - Flapen"
canonical_url: "https://flapen.com/amazon/research/us/automotive/oil-filter-adapter-1-2-28"
last_updated: "2026-07-14T03:08:40.714Z"
locale: en
meta:
  description: "soft demand (-54.3% this quarter) — oil filter adapter 1/2-28 doesn't clear our bar today."
  "og:description": "soft demand (-54.3% this quarter) — oil filter adapter 1/2-28 doesn't clear our bar today."
  "og:title": "oil filter adapter 1/2-28 — Niche Verdict: Skip it (41/100) | Amazon United States - Flapen"
---

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# **oil filter adapter 1/2-28**

**Skip it**

Soft demand (-54.3% this quarter) — this niche doesn't clear our bar today.

Market size 12Growth 0Conversion 97Competition 19Returns 94Price range 44Avg price 54Brand share 38Review moat 96Quality gap 42

**Conversion**

**Incredible****15.4%**

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

**Review moat**

**Incredible****88.92**

avg incumbent reviews — the moat a new listing must climb

**Returns**

**Great****1.0%**

return rate — above 6% kills the launch gate

**Avg price**

**Good****$12.51**

avg listing price — sweet spot $15–$100

**Price range**

**Okay****$8.73–$20.00**

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

**Quality gap**

**Okay****4.5★**

avg incumbent rating — lower means beatable quality

**Brand share**

**Okay****82%**

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

**Competition**

**Bad****77%**

top-5 click share — a locked-up shelf

**Market size**

**Bad****$47K**

$47K/yr · 24K searches

**Growth**

**Bad****-54.3%**

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

## **Competition**

The top 5 products capture 77% of clicks — a locked-up shelf that new listings rarely crack.

**Brands**

**11 **▲rising

**Sellers**

**12**

**Top-5 brand share**

**82%**

**Open market**

**14%**

- Gugaguga50% - Jingzan12% - Axyuada9% - Tllsdss6% - IHOTDER5% - HHLZDHH4% - Open — no brand owns it (5 brands, 14%)

## **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%$5K20%$9K30%$14K40%$19K1101001K Reviews — right = deep review moatMarket 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.

### **Top sellers**

by 90-day click share

[1![2 Pack Thread Adapters and Washers 1/2x28-3/4x16 Black](https://m.media-amazon.com/images/I/41oxwtyUO1L.jpg)**2 Pack Thread Adapters and Washers 1/2x28-3/4x16 Black**Gugaguga**$11.37**4.6★592 rev](https://www.amazon.com/dp/B0BXRHDPHT) [2![Gugaguga 2 Pcs Thread Adapters and Washers 1/2x28-3/4x16 Black](https://m.media-amazon.com/images/I/31uiAF3UsZL.jpg)**Gugaguga 2 Pcs Thread Adapters and Washers 1/2x28-3/4x16 Black**Gugaguga**$12.93**4.5★116 rev](https://www.amazon.com/dp/B0CJ556WMB) [3![4-Pack 304 Stainless Steel 1/2-28 Female to 3/4-16 Male Thread Adapter Heavy-Duty Thread Reducer Converter with Rubber Washers & O-Rings Precision CNC Thread Adapters](https://m.media-amazon.com/images/I/41T7YG4SRTL.jpg)**4-Pack 304 Stainless Steel 1/2-28 Female to 3/4-16 Male Thread Adapter Heavy-Duty Thread Reducer Converter with Rubber Washers & O-Rings Precision CNC Thread Adapters**Jingzan**$16.94**4.7★5 rev](https://www.amazon.com/dp/B0G6JSL17Q) [4![3 Pack Thread Protector and Washers 1/2 * 28-3/4 * 16 Black](https://m.media-amazon.com/images/I/41kfora1BFL.jpg)**3 Pack Thread Protector and Washers 1/2 * 28-3/4 * 16 Black**Axyuada**$10.43**4.5★55 rev](https://www.amazon.com/dp/B0F6MLGBWQ) [5![6 Pack Steel Thread Protector & Washers 1/2x28 to 3/4x16 Black Set Kit](https://m.media-amazon.com/images/I/51gLa91g-FL.jpg)**6 Pack Steel Thread Protector & Washers 1/2x28 to 3/4x16 Black Set Kit**Tllsdss**$20.00**4.4★27 rev](https://www.amazon.com/dp/B0GCZSK37C)

**~~View all top sellers →~~**

### **Newest**

by launch date

[![Senlinyu Thread Adapter and Rubber Washer 1/2-28 to 3/4-16 Thread Protector Fittings for Fuel Cooling Brake System Automotive Accessories for Car Truck SUV (2PCS -1/2-28 to 3/4-16 Thread Protector)](https://m.media-amazon.com/images/I/51jXU1b3XdL.jpg)**Senlinyu Thread Adapter and Rubber Washer 1/2-28 to 3/4-16 Thread Protector Fittings for Fuel Cooling Brake System Automotive Accessories for Car Truck SUV (2PCS -1/2-28 to 3/4-16 Thread Protector)**Senlinyu**$8.73**18 rev4mo ago](https://www.amazon.com/dp/B0GRY5WPL7) [![HNYYZL Thread Adapters with Washers 1/2 * 28-3/4 * 16](https://m.media-amazon.com/images/I/41+-cvs7FAL.jpg)**HNYYZL Thread Adapters with Washers 1/2 * 28-3/4 * 16**HNYYZL**$14.03**1 rev4mo ago](https://www.amazon.com/dp/B0GQS9FNZ3) [![6 Pack Steel Thread Protector & Washers 1/2x28 to 3/4x16 Black Set Kit](https://m.media-amazon.com/images/I/51gLa91g-FL.jpg)**6 Pack Steel Thread Protector & Washers 1/2x28 to 3/4x16 Black Set Kit**Tllsdss**$20.00**27 rev6mo ago](https://www.amazon.com/dp/B0GCZSK37C) [![4-Pack 304 Stainless Steel 1/2-28 Female to 3/4-16 Male Thread Adapter Heavy-Duty Thread Reducer Converter with Rubber Washers & O-Rings Precision CNC Thread Adapters](https://m.media-amazon.com/images/I/41T7YG4SRTL.jpg)**4-Pack 304 Stainless Steel 1/2-28 Female to 3/4-16 Male Thread Adapter Heavy-Duty Thread Reducer Converter with Rubber Washers & O-Rings Precision CNC Thread Adapters**Jingzan**$16.94**5 rev7mo ago](https://www.amazon.com/dp/B0G6JSL17Q) [![SPEEDWOX 2PCS Oil Filter Adapter Thread Adapter 1/2-28 Female to 3/4-16 13/16-16 3/4 NPT Male Hose Reducer Fuel Line Fitting Connector with O-ring and Tape for Oil Coolers Fuel Tanks and Pumps](https://m.media-amazon.com/images/I/41jlHaf1I1L.jpg)**SPEEDWOX 2PCS Oil Filter Adapter Thread Adapter 1/2-28 Female to 3/4-16 13/16-16 3/4 NPT Male Hose Reducer Fuel Line Fitting Connector with O-ring and Tape for Oil Coolers Fuel Tanks and Pumps**SPEEDWOX**$8.91**13 rev9mo ago](https://www.amazon.com/dp/B0FPQSTYWJ)

**~~View all new products →~~**

### **Trending**

90-day click momentum

[![HNYYZL Thread Adapters with Washers 1/2 * 28-3/4 * 16](https://m.media-amazon.com/images/I/41+-cvs7FAL.jpg)**HNYYZL Thread Adapters with Washers 1/2 * 28-3/4 * 16**HNYYZL**$14.03**5.0★**▲ 276%**](https://www.amazon.com/dp/B0GQS9FNZ3) [![Senlinyu Thread Adapter and Rubber Washer 1/2-28 to 3/4-16 Thread Protector Fittings for Fuel Cooling Brake System Automotive Accessories for Car Truck SUV (2PCS -1/2-28 to 3/4-16 Thread Protector)](https://m.media-amazon.com/images/I/51jXU1b3XdL.jpg)**Senlinyu Thread Adapter and Rubber Washer 1/2-28 to 3/4-16 Thread Protector Fittings for Fuel Cooling Brake System Automotive Accessories for Car Truck SUV (2PCS -1/2-28 to 3/4-16 Thread Protector)**Senlinyu**$8.73**4.7★**▲ 276%**](https://www.amazon.com/dp/B0GRY5WPL7) [![4-Pack 304 Stainless Steel 1/2-28 Female to 3/4-16 Male Thread Adapter Heavy-Duty Thread Reducer Converter with Rubber Washers & O-Rings Precision CNC Thread Adapters](https://m.media-amazon.com/images/I/41T7YG4SRTL.jpg)**4-Pack 304 Stainless Steel 1/2-28 Female to 3/4-16 Male Thread Adapter Heavy-Duty Thread Reducer Converter with Rubber Washers & O-Rings Precision CNC Thread Adapters**Jingzan**$16.94**4.7★**▲ 108%**](https://www.amazon.com/dp/B0G6JSL17Q) [![6 Pack Steel Thread Protector & Washers 1/2x28 to 3/4x16 Black Set Kit](https://m.media-amazon.com/images/I/51gLa91g-FL.jpg)**6 Pack Steel Thread Protector & Washers 1/2x28 to 3/4x16 Black Set Kit**Tllsdss**$20.00**4.4★**▲ 106%**](https://www.amazon.com/dp/B0GCZSK37C) [![SPEEDWOX 2PCS Oil Filter Adapter Thread Adapter 1/2-28 Female to 3/4-16 13/16-16 3/4 NPT Male Hose Reducer Fuel Line Fitting Connector with O-ring and Tape for Oil Coolers Fuel Tanks and Pumps](https://m.media-amazon.com/images/I/41jlHaf1I1L.jpg)**SPEEDWOX 2PCS Oil Filter Adapter Thread Adapter 1/2-28 Female to 3/4-16 13/16-16 3/4 NPT Male Hose Reducer Fuel Line Fitting Connector with O-ring and Tape for Oil Coolers Fuel Tanks and Pumps**SPEEDWOX**$8.91**3.9★**▲ 44%**](https://www.amazon.com/dp/B0FPQSTYWJ)

**~~View all trending →~~**

## **Demand & seasonality**

Weekly Amazon search volume, last 104 weeks — -54.3% search growth over the last 90 days.

2K2KBlack Friday '24Holiday '24Spike '25Black Friday '25Spike '26 seasonSepDecMarJunAugNovMarMay

Peak months: Jan, Feb, Dec · busiest ÷ quietest = 4.2×

## **Reviews**

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

### **What buyers love **

**Size-Overall**24%

*“true to size”*

**Advertised Vs Actual Product**23%

*“Just as described”*

**Quality-Overall**15%

*“Good quality adapters for project”*

**Value For Money**10%

*“Great value”*

**Filtration**5%

*“Adding the filter helps with constant flow”*

**Efficiency**5%

*“Works great”*

**Ease Of Cleaning**5%

*“Inside and outside threads are clean”*

**Strength**3%

*“Strong”*

**Fun/Entertainment Experience**2%

*“my children have enjoyed playing with them”*

**Design-Overall**2%

*“Such aesthetics are of no concern for my purpose”*

### **What buyers complain about **

**Quality-Overall**31%

*“Junk”*

**Size-Overall**31%

*“Does not fit”*

**Thickness**6%

*“being thin on the edges”*

**Weight Heavy**6%

*“Heavy”*

**Functionality-Overall**6%

### **Top return reasons **

**Size-Overall**58%

**Compatibility-Overall**8%

**Defective Material/Parts**7%

**Advertised Vs Actual Product**6%

**Quality-Overall**5%

**Functionality-Overall**5%

**Assembly/Installation**4%

**Value For Money**3%

**Shape/Style**1%

**Filtration**1%