---
title: "Onan Generator Oil — $41K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/automotive/onan-generator-oil"
last_updated: "2026-08-10T08:34:45.449Z"
locale: en
meta:
description: "Niche score 43/100 · $41K/yr market · 7K searches/yr · $35.96 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 43/100 · $41K/yr market · 7K searches/yr · $35.96 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Onan Generator Oil — $41K/yr Amazon US Niche (2026) - Flapen"
---
# **onan generator oil**
**Skip it**
A concentrated shelf (top 5 take 100% of clicks) — this niche doesn't clear our bar today.
Market size 10Growth 52Conversion 98Competition 0Returns 97Price range 95Avg price 95Brand share 0Review moat 80Quality gap 11
**Conversion**
**Incredible****16.6%**
search→purchase rate — share of searches ending in a sale
**Returns**
**Incredible****0.5%**
return rate — above 5% kills the launch gate
**Avg price**
**Incredible****$35.96**
avg listing price — sweet spot $15–$100
**Price range**
**Incredible****$16.24–$53.83**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Review moat**
**Great****399.25**
avg incumbent reviews — the moat a new listing must climb
**Growth**
**Good****+23.3%**
90-day search growth — must beat 0% to launch
**Quality gap**
**Bad****4.8★**
avg incumbent rating — lower means beatable quality
**Market size**
**Bad****$41K**
$41K/yr · 7K searches
**Competition**
**Bad****100%**
top-5 click share — a locked-up shelf
**Brand share**
**Bad****100%**
top-5 brand share — brand-locked demand
According to Flapen's Amazon United States niche tracking, onan generator oil is a $41K/yr Amazon United States market (7K searches/yr). The top 5 brands hold 100% of demand. Demand peaks in Jun–Jul–Aug. Verdict: Skip it — 43/100.
Data updated Jul 9, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **onan generator oil market data**
- **Units sold / yr**
- **2K–2K**
- avg 250–500/product
- **Revenue / yr**
- **$54K–$72K**
- units × avg price
- **Conversion rate**
- **16.6%**
- **Avg BSR**
- **#649**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **0%**
- **Out of stock**
- **0.0%**
- **Avg brand age**
- **62 months**
- **Avg seller age**
- **188 days**
## **Competition & brand share**
The top 5 products capture 100% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**2 **▼falling
**Sellers**
**33**
**Top-5 brand share**
**100%**
Top 20: 100%
**Top-5 click share**
**100%**
Top 20: 100%
**Open market**
**0%**
- Cummins93% - RV Wholesale Direct7%
## **Demand & seasonality**
Weekly Amazon search volume, last 58 weeks — +23.3% search growth over the last 90 days.
300200Spike '25Spike '26 seasonJunJulAugSepOctNovDecJanFebMarAprMayJun
Peak months: Jun, Jul, Aug · busiest ÷ quietest = 2.7×
[**Open Trend **](https://flapen.com/research/us/automotive/onan-generator-oil/trend)
## **Top onan generator oil search terms**
- **onan generator oil**3K/yr+14.6%11.9% conv. - **onan oil**3K/yr+51.5%15.1% conv. - **onamax 15w40 oil**1K/yr-38.1%17.6% conv. [**All search terms **](https://flapen.com/research/us/automotive/onan-generator-oil/search-terms)
## **Top onan generator oil 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.
0%20%$8K40%$16K60%$24K80%$32K101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 4 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Onan OnaMax SAE 15W-40 Engine Oil 32 oz.**Cummins**$16.24**4.8★1,058 rev](https://www.amazon.com/dp/B00278MET8) [2**Cummins 3265336 Onan SAE 15W-40 Oil - 1 Quart (Quantity 3)**Cummins**$45.14**4.9★212 rev](https://www.amazon.com/dp/B00YBFXRGY) [3**OnaMax SAE10W-30 - (A063E183) (2)**RV Wholesale Direct**$53.83**4.8★18 rev](https://www.amazon.com/dp/B08Q9SC9CR) [4**Cummins 3265336 Onan SAE 15W-40 Oil - 1 Quart Quantity 2**Cummins**$28.63**4.8★309 rev](https://www.amazon.com/dp/B00YBFXQEW)
### **Newest**
by launch date
[**OnaMax SAE10W-30 - (A063E183) (2)**RV Wholesale Direct**$53.83**18 rev5y ago](https://www.amazon.com/dp/B08Q9SC9CR) [**Cummins 3265336 Onan SAE 15W-40 Oil - 1 Quart (Quantity 3)**Cummins**$45.14**212 rev10y ago](https://www.amazon.com/dp/B00YBFXRGY) [**Cummins 3265336 Onan SAE 15W-40 Oil - 1 Quart Quantity 2**Cummins**$28.63**309 rev10y ago](https://www.amazon.com/dp/B00YBFXQEW) [**Onan OnaMax SAE 15W-40 Engine Oil 32 oz.**Cummins**$16.24**1,058 rev13y ago](https://www.amazon.com/dp/B00278MET8)
### **Trending**
90-day click momentum
[**Onan OnaMax SAE 15W-40 Engine Oil 32 oz.**Cummins**$16.24**4.8★**▲ 14%**](https://www.amazon.com/dp/B00278MET8) [**OnaMax SAE10W-30 - (A063E183) (2)**RV Wholesale Direct**$53.83**4.8★**▲ 10%**](https://www.amazon.com/dp/B08Q9SC9CR) [**Cummins 3265336 Onan SAE 15W-40 Oil - 1 Quart (Quantity 3)**Cummins**$45.14**4.9★**▼ 22%**](https://www.amazon.com/dp/B00YBFXRGY) [**Cummins 3265336 Onan SAE 15W-40 Oil - 1 Quart Quantity 2**Cummins**$28.63**4.8★**▼ 36%**](https://www.amazon.com/dp/B00YBFXQEW)
## **What buyers say about onan generator oil**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**31%
*“Top quality”*
**Value For Money**25%
*“Great price”*
**Correct Contents**13%
*“Perfect quantity”*
**Lubrication**13%
*“Using the manufacturer-recommended oil just makes sense”*
**Motor Power**13%
*“High-quality makes my generator run really good”*
**Advertised Vs Actual Product**6%
*“Exactly what I needed”*
### **Top return reasons **
**Leak-Proof**46%
**Assembly/Installation**15%
**Lubrication**15%
**Maintenance And Repair**8%
**Advertised Vs Actual Product**8%
**Value For Money**8%
## **Common questions**
- **Is onan generator oil profitable to sell on Amazon United States?**
- The niche generates $41K/yr across 4 tracked products. 90-day search growth is +23.3%. Flapen's verdict: Skip it (43/100).
- **How competitive is the onan generator oil niche?**
- 2 brands and 33 sellers compete. The top 5 products take 100% of clicks and top 5 brands hold 100% of demand.
- **When does demand for onan generator oil peak?**
- Demand peaks in Jun–Jul–Aug; the busiest month runs 2.7× the quietest.
- **What does it cost to enter the onan generator oil niche?**
- Listings span $16.24–$53.83; the average listing price is $35.96 (sweet spot $15–$100). The average incumbent carries 399 reviews — the moat a new listing must climb.
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