4 cycle engine oil
Worth a lookShows low returns (0.4%), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.
Returns
Incredible0.4%return rate — above 5% kills the launch gate
Growth
Great+94.8%90-day search growth — must beat 0% to launch
Avg price
Great$17.81avg listing price — sweet spot $15–$100
Conversion
Great8.2%search→purchase rate — share of searches ending in a sale
Price range
Good$6.39–$38.07cheapest to priciest tracked listing — scored on the share inside $15–$100
Review moat
Good846.17avg incumbent reviews — the moat a new listing must climb
Market size
Good$389K$389K/yr · 268K searches
Brand share
Okay78%top-5 brand share — brands hold most of the demand
Competition
Okay62%top-5 click share — leaders hold, buyers still browse
Quality gap
Bad4.8★avg incumbent rating — lower means beatable quality
According to Flapen's Amazon United States niche tracking, 4 cycle engine oil is a $389K/yr Amazon United States market (268K searches/yr). The top 5 brands hold 78% of demand. Demand peaks in Apr–May–Jun–Jul. Verdict: Worth a look — 62/100.
Data updated Jul 9, 2026 · scored weekly · How we score niches
4 cycle engine oil market data
- Units sold / yr
- 25K–30K
- avg 1,250–1,500/product
- Revenue / yr
- $445K–$534K
- units × avg price
- Conversion rate
- 8.2%
- Avg BSR
- #139
- Page quality
- 0%
- Prime
- 94%
- Sponsored
- 50%
- Out of stock
- 0.0%
- Avg brand age
- 92 months
- Avg seller age
- 155 days
Competition & brand share
The top 5 products take 62% of clicks — established leaders, but buyers still shop beyond them.Brands
11 falling
Sellers
108
Top-5 brand share
78%
Top 20: 100%
Top-5 click share
62%
Top 20: 100%
Open market
17%
- STP27%
- Valvoline25%
- Toro11%
- Stens9%
- Pennzoil6%
- Briggs & Stratton5%
- Open — no brand owns it (5 brands, 17%)
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — +94.8% search growth over the last 90 days.Peak months: Apr, May, Jun, Jul · busiest ÷ quietest = 9.1×
Top 4 cycle engine oil search terms
- sae 30 oil78K/yr
- sae 30 lawnmower oil50K/yr
- 30w motor oil12K/yr
- sae 3015K/yr
- lawn mower oil sae 3013K/yr
- 30 weight motor oil13K/yr
- sae30 lawn mower oil8K/yr
- 30w oil15K/yr
- toro oil8K/yr
- toro lawn mower oil6K/yr
Top 4 cycle engine 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.
All 18 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
STP Premium Synthetic Blend 4 Cycle Small Engine Oil SAE 10w30 Motor Oil for Lawnmowers Generators Tractors Snow Blowers and More 32 fl oz
STP$11.004.8★3,439 rev
Valvoline Daily Protection Non-Detergent SAE 30 Conventional Motor Oil 1 QT
Valvoline$9.474.8★1,052 rev
Stens Shield 770-032 48oz Bottle SAE 30 4-Cycle Engine Oil
Stens$19.594.6★108 rev
Toro SAE 30 Summer Oil - 18 Ounce Bottle
Toro$12.794.8★298 rev
Valvoline Daily Protection SAE 30 Conventional Motor Oil 1 QT Case of 6
Valvoline$34.924.8★610 rev
Newest
by launch date
Toro 38903 SAE 30 Engine Oil Quart and Fuel Treatment
Toro$18.9119 rev
VP Racing Fuels 2927 4-Cycle Engine Oil - SAE 30 / 10W30 Full Synthetic Small Engine Oil 18 Ounce (1 Pack)
VP Racing$6.99193 rev
SAE 30 Full Synthetic Lawn Mower Oil by Mannol Generator Lubricant Premium 4-Stroke Small Engine Oil 1L
MANNOL$18.83978 rev
Briggs and Stratton (Pack of 2) 100005 SAE 30 Engine Oil 18oz Bottle and Fuel Treatment
Briggs & Stratton$24.11226 rev
Stens Shield 770-032 48oz Bottle SAE 30 4-Cycle Engine Oil
Stens$19.59108 rev
Trending
90-day click momentumValvoline Daily Protection Non-Detergent SAE 30 Conventional Motor Oil 1 QT
Valvoline$9.474.8★
Quaker State Motor Oil HD 30 1 Quart (6 Pack)
Quaker State$35.704.8★
Stens Shield 770-032 48oz Bottle SAE 30 4-Cycle Engine Oil
Stens$19.594.6★
SAE 30 Full Synthetic Lawn Mower Oil by Mannol Generator Lubricant Premium 4-Stroke Small Engine Oil 1L
MANNOL$18.834.6★
Toro 38903 SAE 30 Engine Oil Quart and Fuel Treatment
Toro$18.914.9★
What buyers say about 4 cycle engine oil
What buyers praise and complain about, mined from review topics.What buyers love
“Good quality”
“Perfect amount of oil for my mower”
“reasonable price”
“product is as advertised”
“Put it in my lawn mower ran great”
“Easy to use”
“Perfect for small 4 cycle engines”
“Great size for the price”
“Quality smoke level noise level durability fit gas mileage everything works good for me”
“Correct 👍 product”
What buyers complain about
“Small engine oil”
“Not for most peoples use”
“NOT THE SAME”
“I'm even hearing engine noises i've not heard before”
“Leaking oil bottle”
“I noticed that the last time I had my oil change, the motor wasn't sounding the same, I checked and the outfit was using 5-30W”
“too expensive”
“smaller bottle for pressure washer”
“Before, it would stop as soon as it started, which was very troublesome, especially when it was cold”
Top return reasons
Common questions
- Is 4 cycle engine oil profitable to sell on Amazon United States?
- The niche generates $389K/yr across 18 tracked products. 90-day search growth is +94.8%. Flapen's verdict: Worth a look (62/100).
- How competitive is the 4 cycle engine oil niche?
- 11 brands and 108 sellers compete. The top 5 products take 62% of clicks and top 5 brands hold 78% of demand.
- What do buyers complain about in 4 cycle engine oil?
- Top complaints mined from reviews: Size-Overall, Ease Of Use, Advertised Vs Actual Product. The return rate is 0.4%.
- When does demand for 4 cycle engine oil peak?
- Demand peaks in Apr–May–Jun–Jul; the busiest month runs 9.1× the quietest.
- What does it cost to enter the 4 cycle engine oil niche?
- Listings span $6.39–$38.07; the average listing price is $17.81 (sweet spot $15–$100). The average incumbent carries 846 reviews — the moat a new listing must climb.