oil cap
Worth a lookShows a fragmented shelf (top 5 take 22% of clicks), but soft demand (-15.6% this quarter) keeps it on the watch list.
Competition
Great22%top-5 click share — an open shelf
Review moat
Great186.53avg incumbent reviews — the moat a new listing must climb
Brand share
Great56%top-5 brand share — no brand owns this niche
Quality gap
Great4.3★avg incumbent rating — lower means beatable quality
Conversion
Good4.3%search→purchase rate — share of searches ending in a sale
Returns
Okay3.6%return rate — above 6% kills the launch gate
Price range
Okay$5.50–$20.70cheapest to priciest tracked listing — scored on the share inside $15–$100
Avg price
Okay$10.35avg listing price — sweet spot $15–$100
Market size
Bad$97K$97K/yr · 218K searches
Growth
Bad-15.6%90-day search growth — must beat 0% to launch
Competition
Clicks spread well past the top 5 (22% combined) — an open shelf where new products get seen.Brands
37 falling
Sellers
132
Top-5 brand share
56%
Open market
39%
- Manymiba24%
- ACDelco12%
- KUQUTIDY9%
- MotoRad7%
- A-Premium5%
- Anleecap5%
Product shelf
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
All 96 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
KUQUTIDY Engine Oil Filler Cap Replacement Compatible with GM 1992-2018 1994-2011 Chevrolet GMC Cadillac Buick Oldsmobile Pontiac Hummer Saab Isuzu Repalce FC208 12573337
KUQUTIDY$9.023.6★67 rev
Engine Oil Filler Cap for Dodge Ram Jeep Chrysler 1997-2003 Ram 1500 2500 3500 Wrangler Cherokee Caravan Dakota Durango Intrepid Neon Stratus Concorde PT Cruiser 53010654AA 04648831AA
Manymiba$7.454.6★70 rev
KoiLuvGo Engine Oil Filler Cap Replacement Compatible with GM 1992-2018 1994-2011 Chevrolet GMC Cadillac Buick Oldsmobile Pontiac Hummer Saab Isuzu Replaces OEM #FC208 12573337
KoiLuvGo$9.072.5★15 rev
ACDelco GM Original Equipment FC219 (12589430) Engine Oil Filler Cap
ACDelco$14.894.7★1,414 rev
ACDelco GM Original Equipment FC208 (12573337) Engine Oil Filler Cap
ACDelco$10.774.7★1,496 rev
Newest
by launch date
AurLunUs Engine Oil Filler Cap Replacement automotive oil cap Compatible with GM 1992-2018 1994-2011 Chevrolet GMC Cadillac Buick Oldsmobile Pontiac Hummer Saab Isuzu Replaces OEM #FC208 12573337
AurLunUs$8.990 rev
CCNU FC208 Engine Oil Filler Cap Replacement Compatible with GM 1992-2018 1994-2011 Chevrolet GMC Cadillac Buick Oldsmobile Pontiac Hummer Saab Isuzu Repalce #FC208 12573337 Oil Tank Cap
CCNU$10.041 rev
Engine Oil Cap Replacement Durable Oil Filler Cap Part Eligible for Replace FC208 12573337 Engine Oils Caps Compatible with Chevrolet/GMC/Cadillac/Buick/Oldsmobile/Pontiac
TSIEBRV$7.833 rev
CCNU Engine Oil Filler Cap Replacement Compatible with Jeep Wrangler Cherokee Grand Cherokee Dodge Ram 1500 2500 3500 Dakota Durango Caravan Neon Chrysler Concorde PT Cruiser 53010654AA 04648831AA
CCNU$8.113 rev
Lxsloet Engine Oil Filler Cap Oil Cap Replacement Brake Fluid Cap Compatible with Wrangler Grand Cherokee Dakota for Chrysler Dodge Ram 1500 2500 3500 Replaces OEM# 53010654AA 04648831AA
Lxsloet$9.453 rev
Trending
90-day click momentumCCNU FC208 Engine Oil Filler Cap Replacement Compatible with GM 1992-2018 1994-2011 Chevrolet GMC Cadillac Buick Oldsmobile Pontiac Hummer Saab Isuzu Repalce #FC208 12573337 Oil Tank Cap
CCNU$10.041.0★
AurLunUs Engine Oil Filler Cap Replacement automotive oil cap Compatible with GM 1992-2018 1994-2011 Chevrolet GMC Cadillac Buick Oldsmobile Pontiac Hummer Saab Isuzu Replaces OEM #FC208 12573337
AurLunUs$8.990.0★
CCNU Engine Oil Filler Cap Replacement Compatible with Jeep Wrangler Cherokee Grand Cherokee Dodge Ram 1500 2500 3500 Dakota Durango Caravan Neon Chrysler Concorde PT Cruiser 53010654AA 04648831AA
CCNU$8.113.3★
Engine Oil Cap Replacement Durable Oil Filler Cap Part Eligible for Replace FC208 12573337 Engine Oils Caps Compatible with Chevrolet/GMC/Cadillac/Buick/Oldsmobile/Pontiac
TSIEBRV$7.834.6★
ESWW Engine Oil Filler Cap Replacement Durable Oil Fill Cap for Secure Sealing Leak-Proof Tight Fit Design with Identification Pattern Replaces OEM 06K103485A Compatible with VW Audi
ESWW$7.161.0★
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — -15.6% search growth over the last 90 days.No pronounced peak months · busiest ÷ quietest = 1.3×
Reviews
What buyers praise and complain about, mined from review topics.What buyers love
“Fit my jeep”
“Good quality”
“Works as advertised”
“Good Value”
“Works well”
“The oil cap was decent”
“Fixed my oil leak on 09 ford escape 3.0 v6”
“Works as designed”
“Installation was super easy”
“Item works as described”
What buyers complain about
“it doesnt fit my Car”
“Not compatible”
“fell off after a few of days of driving”
“The quality is the part that I am questioning as the part appears to be a little bit smaller on the top part”
“Inaccurate information”
“it had started leaking a mess I didnt think I could find an alternative”
“Defective part”
“There is a manufacturers defect in the motor causing the PCV valve to clog”
“The cap actually screws in so it doesnt pop off like a cheap plug”
“A mere paperweight”