5w-30 full synthetic 6 quarts
Skip itBrand-locked demand (top 5 brands take 100% of clicks) — this niche doesn't clear our bar today.
Returns
Incredible0.6%return rate — above 5% kills the launch gate
Avg price
Incredible$33.93avg listing price — sweet spot $15–$100
Price range
Incredible$20.59–$80.88cheapest to priciest tracked listing — scored on the share inside $15–$100
Conversion
Good5.0%search→purchase rate — share of searches ending in a sale
Competition
Good52%top-5 click share — leaders hold, buyers still browse
Growth
Okay+14.1%90-day search growth — must beat 0% to launch
Review moat
Bad4,948.71avg incumbent reviews — the moat a new listing must climb
Quality gap
Bad4.8★avg incumbent rating — lower means beatable quality
Market size
Bad$50K$50K/yr · 29K searches
Brand share
Bad100%top-5 brand share — brand-locked demand
According to Flapen's Amazon United States niche tracking, 5w-30 full synthetic 6 quarts is a $50K/yr Amazon United States market (29K searches/yr). The top 5 brands hold 100% of demand. Verdict: Skip it — 44/100.
Data updated Jul 9, 2026 · scored weekly · How we score niches
5w-30 full synthetic 6 quarts market data
- Units sold / yr
- 2K–3K
- avg 100–250/product
- Revenue / yr
- $68K–$85K
- units × avg price
- Conversion rate
- 5.0%
- Avg BSR
- #57
- Page quality
- 0%
- Prime
- 96%
- Sponsored
- 58%
- Out of stock
- 0.0%
- Avg brand age
- 122 months
- Avg seller age
- 157 days
Competition & brand share
The top 5 products take 52% of clicks — established leaders, but buyers still shop beyond them.Brands
5 flat
Sellers
83
Top-5 brand share
100%
Top 20: 100%
Top-5 click share
52%
Top 20: 97%
Open market
0%
- HAVOLINE42%
- Mobil21%
- Castrol18%
- Valvoline10%
- Pennzoil8%
Demand
Weekly Amazon search volume, last 31 weeks — +14.1% search growth over the last 90 days.Top 5w-30 full synthetic 6 quarts search terms
- 5w30 full synthetic 6 quarts9K/yr
- havoline 5w30 full synthetic5K/yr
- 5w-30 full synthetic oil 6 quarts4K/yr
- 6 quarts 5w30 full synthetic oil6K/yr
- havoline 5w302K/yr
- havoline 5w30 motor oil4K/yr
Top 5w-30 full synthetic 6 quarts 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 24 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Havoline Motor Oil 5w30 High Mileage Synthetic Technology Smart Change Engine Oil 5W-30 6 Quarts Pack of 1
HAVOLINE$23.224.7★158 rev
Havoline Motor Oil 5w30 PRO-DS Lifelong Full Synthetic Smart Change Engine Oil 5W-30 6 Quarts Pack of 1
HAVOLINE$27.614.8★101 rev
Mobil Full Synthetic Motor Oil 5W-30 1 Quart (6-pack)
Mobil$33.004.9★470 rev
Castrol EDGE 5W-30 Advanced Full Synthetic Motor Oil 6 Quarts EcoPack
Castrol$36.134.6★48 rev
Castrol EDGE High Mileage 5W-30 Advanced Full Synthetic Motor Oil 6 Quarts EcoPack
Castrol$37.444.8★41 rev
Newest
by launch dateCastrol EDGE 5W-30 Advanced Full Synthetic Motor Oil 6 Quarts EcoPack
Castrol$36.1348 rev
Castrol EDGE High Mileage 5W-30 Advanced Full Synthetic Motor Oil 6 Quarts EcoPack
Castrol$37.4441 rev
Havoline Motor Oil 5w30 High Mileage Synthetic Technology Smart Change Engine Oil 5W-30 6 Quarts Pack of 1
HAVOLINE$23.22158 rev
Havoline Motor Oil 5w30 PRO-DS Lifelong Full Synthetic Smart Change Engine Oil 5W-30 6 Quarts Pack of 1
HAVOLINE$27.61101 rev
Havoline Motor Oil 5w30 PRO-DS Lifelong Full Synthetic Smart Change Engine Oil 5W-30 6 Quarts Pack of 2
HAVOLINE$55.54101 rev
Trending
90-day click momentum
Havoline Motor Oil 5w20 PRO-DS Lifelong Full Synthetic Smart Change Engine Oil 5W-20 6 Quarts Pack of 1
HAVOLINE$27.764.9★
Pennzoil Platinum Full Synthetic 5W-30 Motor Oil 5 Quart
Pennzoil$24.554.8★
Havoline Motor Oil 5w20 Synthetic Blend Smart Change Engine Oil 5W-20 6 Quarts Pack of 1
HAVOLINE$23.354.7★
Castrol EDGE High Mileage 5W-30 Advanced Full Synthetic Motor Oil 6 Quarts EcoPack
Castrol$37.444.8★
Havoline Motor Oil 5w30 PRO-DS Lifelong Full Synthetic Smart Change Engine Oil 5W-30 6 Quarts Pack of 2
HAVOLINE$55.544.8★
What buyers say about 5w-30 full synthetic 6 quarts
What buyers praise and complain about, mined from review topics.What buyers love
“Fair price”
“Excellent product”
“Good synthetic oil”
“As advertised”
“It's the correct motor oil for the vehicle it should work fine”
“Keeping the GM motor running strong”
“Ease of use”
“Car still runs great”
“Jug was delivered no leaks”
“Perfect fit for OEM”
What buyers complain about
“arrived leaking”
“Its slippy oil”
“Container difficult to use”
“New cars are expensive”
“False description”
“It would of blown up my engine”
“Junk”
“the cardboard can get oil soaked when pouring oil so then can't be recycled”
“Waste”
“No PAO on SDS”
Top return reasons
Common questions
- Is 5w-30 full synthetic 6 quarts profitable to sell on Amazon United States?
- The niche generates $50K/yr across 24 tracked products. 2 of 2 products launched in the last 360 days are still selling. 90-day search growth is +14.1%. Flapen's verdict: Skip it (44/100).
- How competitive is the 5w-30 full synthetic 6 quarts niche?
- 5 brands and 83 sellers compete. The top 5 products take 52% of clicks and top 5 brands hold 100% of demand.
- What do buyers complain about in 5w-30 full synthetic 6 quarts?
- Top complaints mined from reviews: Leak-Proof, Lubrication, Ease Of Use. The return rate is 0.6%.
- What does it cost to enter the 5w-30 full synthetic 6 quarts niche?
- Listings span $20.59–$80.88; the average listing price is $33.93 (sweet spot $15–$100). The average incumbent carries 4,949 reviews — the moat a new listing must climb.