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Def

Fail

Prices span $12.58–$1401.02, mostly outside the sweet spot, so Def is a Fail.

Flapen Score
49
49 / 100
Ranks 3,500 of 7,287 Automotive niches · on the category median
Market size
$6.7M/yr818K searches / yr
90-day growth
-12.6%search demand this quarter
Competition
61%top-5 click share · 10 brands · 118 sellers

Flapen Score

Def against its category

The dotted line is the Automotive average. Past it, Def is stronger. Inside it, weaker.

49Fail
Big MarketTrendingHigh ConversionOpen MarketLow ReturnsPrice rangeAvg priceNo Dominant BrandLow Review BarrierQuality Gap
This niche Category average

Market

The Def market on Amazon at a glance

Shoppers on Amazon United States searched for Def 818K times last year and spent an estimated $6.7M. The top 5 brands take 93% of clicks. Flapen scores it 49 out of 100, a Fail.

01 · Demand

An estimated 3.5% of those searches ended in a purchase.

Shoppers searched for this 818K times in the last 12 months. That counts every search on Amazon United States for this niche's terms. An estimated 3.5% of those searches ended in a purchase. Searches in the last 90 days moved -12.6% against the 90 days before. Searches, conversion and average price together put the market at an estimated $6.7M a year.

Searches, last 12 months
818K
Growth, 90 days vs prior 90
-12.6%
Conversion, latest week
3.5%
Market size, estimated
$6.7Ma year
Peak month
January1.3× the quietest month
Top search term
def392K searches a year

02 · Price

A sale here is worth $235.10.

Listings sell for $235.10 on average, from $12.58 to $1401.02. Amazon reports units sold in ranges. This niche sold 30K to 40K a year. The average listing sells 1,250 to 1,500 of them. At $235.10 that is $294K to $353K a year per listing.

Average price
$235.10above the $15 to $100 sweet spot
Price range
$12.58–$1401.02
Amazon United States median price
$24.38across 115,062 niches
Units sold a year
30K–40K
Units per listing a year
1,250–1,500
Revenue per listing a year
$294K–$353K
Returns
0.3%of orders · Amazon United States median 2.1%

03 · Entry bar

The bar here is low.

73% of listings pay for placement with sponsored ads. 23% ship with Prime. On an average day, 0.0% of listings are out of stock. The average listing ranks #74 within Oils & Fluids. It carries 283 reviews at 4.60 stars, so a new listing needs social proof before a better product.

Sponsored listings
73%
Prime listings
23%
Out of stock, average day
0.0%
Average rank
#74in Oils & Fluids
Average rating
4.60 starsAmazon United States average 4.42 stars
Average reviews
283per listing
Listings tracked
26

04 · Newcomers

3 of last year's 4 launches cleared the first-year sales bar.

4 products launched here in the last 12 months. 3 of them cleared the first-year sales bar, our mark for a successful launch. The brands on the shelf have sold for 63 months on average, so the names here are established.

Launched, last 12 months
4
Successful launches
3Amazon's first-year sales bar
Average brand age
63 months

Products

Top Def products & what they sell for

Every tracked product: its share of the shelf, its reviews, and its price.

Sign in to see the products

The products selling in this niche are for signed-in readers. Every market figure above stays open to everyone.

Competition

Competition: brands, sellers & click share

The top 5 products take 61% of clicks. Leaders hold, but buyers still shop past them.

Brands

10 rising

Sellers

118

Top-5 brand share

93%

Top 20: 100%

Top-5 click share

61%

Top 20: 94%

Open market

5%

  • Brand 170%
  • Brand 29%
  • Brand 36%
  • Brand 45%
  • Brand 53%
  • Brand 62%
  • Open — no brand owns it (4 brands, 5%)

Demand

Def search demand

Weekly searches over the year, seasonality beneath. Pick a range.

20K15KSpike '26SepDecMarJunAugNovMarMay

No pronounced peak months · busiest ÷ quietest = 1.3×

Search terms

Top Def search terms shoppers use

The exact words shoppers type, with yearly volume, growth, and conversion.

  • def392K/yr
  • def fluid262K/yr
  • blue def37K/yr
  • diesel exhaust fluid30K/yr
  • blue def diesel exhaust fluid27K/yr
  • def fluid for diesels26K/yr
  • blue def platinum11K/yr
  • def fluid 2.5 gallon6K/yr
  • blue def platinum diesel exhaust fluid8K/yr
  • def diesel exhaust fluid6K/yr

Reviews and returns

What reviews say buyers love and hate about Def

We read the reviews and the return reasons for every product selling here.

24%of positive reviews mention “Value For Money”
47%of negative reviews mention “Value For Money”
0.3%of orders come back
“Better price”
A buyer, on “Value For Money”47% of negative reviews mention the same topic

Every topic

Every topic buyers talk about, one row each.

Red shows the share of negative reviews and green the share of positive reviews, biggest topic first. Open a row to read what they wrote.

19 topics

NegativePositive

FAQ

Common Def questions

Answered from the same tracked data.