castrol transynd 668
Skip itA concentrated shelf (top 5 take 100% of clicks) — this niche doesn't clear our bar today.
Conversion
Great11.6%search→purchase rate — share of searches ending in a sale
Returns
Great1.3%return rate — above 5% kills the launch gate
Avg price
Good$103.10avg listing price — sweet spot $15–$100
Market size
Good$654K$654K/yr · 55K searches
Review moat
Okay2,062.2avg incumbent reviews — the moat a new listing must climb
Price range
Okay$36.84–$184.50cheapest to priciest tracked listing — scored on the share inside $15–$100
Growth
Okay+2.3%90-day search growth — must beat 0% to launch
Quality gap
Bad4.8★avg incumbent rating — lower means beatable quality
Competition
Bad100%top-5 click share — a locked-up shelf
Brand share
Bad100%top-5 brand share — brand-locked demand
According to Flapen's Amazon United States niche tracking, castrol transynd 668 is a $654K/yr Amazon United States market (55K searches/yr). The top 5 brands hold 100% of demand. Demand peaks in Apr–May–Jun. Verdict: Skip it — 41/100.
Data updated Jul 9, 2026 · scored weekly · How we score niches
castrol transynd 668 market data
- Units sold / yr
- 6K–8K
- avg 1,250–1,500/product
- Revenue / yr
- $619K–$825K
- units × avg price
- Conversion rate
- 11.6%
- Avg BSR
- #28
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 100%
- Out of stock
- 3.9%
- Avg brand age
- 80 months
- Avg seller age
- 135 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
28
Top-5 brand share
100%
Top 20: 100%
Top-5 click share
100%
Top 20: 100%
Open market
0%
- Castrol97%
- ACDelco3%
- Open — no brand owns it (0%)
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — +2.3% search growth over the last 90 days.Peak months: Apr, May, Jun · busiest ÷ quietest = 2.5×
Top castrol transynd 668 search terms
- castrol transynd 66811K/yr
- transynd 668 allison transmission fluid12K/yr
- transynd 66810K/yr
- allison transmission fluid9K/yr
- allison 1000 transmission fluid4K/yr
- tes 295 transmission fluid3K/yr
- transynd3K/yr
- transynd allison transmission fluid2K/yr
Top castrol transynd 668 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 5 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Castrol TranSynd 668 Synthetic Automatic Transmission Fluid 1 gal
Castrol$45.374.8★1,032 rev
Castrol TranSynd 668 Full-Synthetic Automatic Transmission Fluid 1 Gallon Pack of 3
Castrol$121.814.9★98 rev
Castrol TranSynd 668 Full-Synthetic Automatic Transmission Fluid 5 Gallon Pail
Castrol$184.504.8★326 rev
Castrol TranSynd 668 Allison 2021 Updated SPEC CASE of 3 by DOXA Worldwide
Castrol$126.964.8★1,032 rev
ACDelco GM Original Equipment 10-9395 Dexron VI Automatic Transmission Fluid - 1 gal
ACDelco$36.844.8★7,823 rev
Newest
by launch dateCastrol TranSynd 668 Full-Synthetic Automatic Transmission Fluid 1 Gallon Pack of 3
Castrol$121.8198 rev
Castrol TranSynd 668 Full-Synthetic Automatic Transmission Fluid 5 Gallon Pail
Castrol$184.50326 rev
Castrol TranSynd 668 Synthetic Automatic Transmission Fluid 1 gal
Castrol$45.371,032 rev
Castrol TranSynd 668 Allison 2021 Updated SPEC CASE of 3 by DOXA Worldwide
Castrol$126.961,032 rev
ACDelco GM Original Equipment 10-9395 Dexron VI Automatic Transmission Fluid - 1 gal
ACDelco$36.847,823 rev
Trending
90-day click momentumCastrol TranSynd 668 Full-Synthetic Automatic Transmission Fluid 1 Gallon Pack of 3
Castrol$121.814.9★
Castrol TranSynd 668 Full-Synthetic Automatic Transmission Fluid 5 Gallon Pail
Castrol$184.504.8★
Castrol TranSynd 668 Synthetic Automatic Transmission Fluid 1 gal
Castrol$45.374.8★
ACDelco GM Original Equipment 10-9395 Dexron VI Automatic Transmission Fluid - 1 gal
ACDelco$36.844.8★
Castrol TranSynd 668 Allison 2021 Updated SPEC CASE of 3 by DOXA Worldwide
Castrol$126.964.8★
What buyers say about castrol transynd 668
What buyers praise and complain about, mined from review topics.What buyers love
“Quality product for GM cars”
“Best price”
“As expected”
“All maintenance matters”
“Works great in my Tahoes transmission”
“Genuine gm transmission fluid A+ It's a must when changing transmission filters”
“Great fluid”
“Best for GM trucks”
“Convenient way to buy”
What buyers complain about
“Leaking product”
“upon arrival the box was stained”
Top return reasons
Common questions
- Is castrol transynd 668 profitable to sell on Amazon United States?
- The niche generates $654K/yr across 5 tracked products. 90-day search growth is +2.3%. Flapen's verdict: Skip it (41/100).
- How competitive is the castrol transynd 668 niche?
- 2 brands and 28 sellers compete. The top 5 products take 100% of clicks and top 5 brands hold 100% of demand.
- What do buyers complain about in castrol transynd 668?
- Top complaints mined from reviews: Leak-Proof, Stain Resistance. The return rate is 1.3%.
- When does demand for castrol transynd 668 peak?
- Demand peaks in Apr–May–Jun; the busiest month runs 2.5× the quietest.
- What does it cost to enter the castrol transynd 668 niche?
- Listings span $36.84–$184.50; the average listing price is $103.10 (sweet spot $15–$100). The average incumbent carries 2,062 reviews — the moat a new listing must climb.