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5w40 Engine Oil

Maybe

An estimated 0.6% of orders come back. But the products selling today already average 4.8★, so 5w40 Engine Oil is a Maybe.

Flapen Score
50
50 / 100
Top 43% of 811 Automotive niches · +1 vs the category median of 49
Market size
£188K/yr119K searches / yr
90-day growth
+19.2%search demand this quarter
Competition
63%top-5 click share · 8 brands · 53 sellers

Flapen Score

5w40 Engine Oil against its category

The dotted line is the Automotive average. Past it, 5w40 Engine Oil is stronger. Inside it, weaker.

50Maybe
Big MarketTrendingHigh ConversionOpen MarketLow ReturnsPrice rangeAvg priceNo Dominant BrandLow Review BarrierQuality Gap
This niche Category average

Market

The 5w40 Engine Oil market on Amazon at a glance

Shoppers on Amazon United Kingdom searched for 5w40 Engine Oil 119K times last year and spent an estimated £188K. The top 5 brands take 93% of clicks. Flapen scores it 50 out of 100, a Maybe.

01 · Demand

An estimated 6.8% of those searches ended in a purchase.

Shoppers searched for this 119K times in the last 12 months. That counts every search on Amazon United Kingdom for this niche's terms. An estimated 6.8% of those searches ended in a purchase. Searches in the last 90 days moved +19.2% against the 90 days before. Searches, conversion and average price together put the market at an estimated £188K a year.

Searches, last 12 months
119K
Growth, 90 days vs prior 90
+19.2%
Conversion, latest week
6.8%
Market size, estimated
£188Ka year
Peak month
May1.4× the quietest month
Top search term
5w40 engine oil44K searches a year

02 · Price

A sale here is worth £23.02.

Listings sell for £23.02 on average, from £7.44 to £42.20. Amazon reports units sold in ranges. This niche sold 8K to 10K a year. The average listing sells 250 to 500 of them. At £23.02 that is £6K to £12K a year per listing.

Average price
£23.02inside the $15 to $100 sweet spot
Price range
£7.44–£42.20
Amazon United Kingdom median price
£12.12across 27,606 niches
Units sold a year
8K–10K
Units per listing a year
250–500
Revenue per listing a year
£6K–£12K
Returns
0.6%of orders · Amazon United Kingdom median 0.6%

03 · Entry bar

The bar here is reviews.

82% of listings pay for placement with sponsored ads. 100% ship with Prime. On an average day, 9.1% of listings are out of stock. The average listing ranks #93 within Oils & Fluids. It carries 1,728 reviews at 4.76 stars, so a new listing needs social proof before a better product.

Sponsored listings
82%
Prime listings
100%
Out of stock, average day
9.1%
Average rank
#93in Oils & Fluids
Average rating
4.76 starsAmazon United Kingdom average 4.36 stars
Average reviews
1,728per listing
Listings tracked
17

04 · Newcomers

Brands here are established.

The brands on the shelf have sold for 88 months on average, so the names here are established.

Launched, last 12 months
0
Successful launches
0Amazon's first-year sales bar
Average brand age
88 months

Products

Top 5w40 Engine Oil 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 63% of clicks. Leaders hold, but buyers still shop past them.

Brands

8 falling

Sellers

53

Top-5 brand share

93%

Top 20: 100%

Top-5 click share

63%

Top 20: 100%

Open market

4%

  • Brand 171%
  • Brand 27%
  • Brand 36%
  • Brand 46%
  • Brand 53%
  • Brand 63%
  • Open — no brand owns it (2 brands, 4%)

Demand

5w40 Engine Oil search demand

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

4K3KSpike '24Holiday '24Prime Day '25Spike '25Black Friday '25Spike '26SepDecMarJunAugNovMarMay

No pronounced peak months · busiest ÷ quietest = 1.4×

Search terms

Top 5w40 Engine Oil search terms shoppers use

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

  • 5w40 engine oil44K/yr
  • 5w4014K/yr
  • 5w 40 fully synthetic engine oil12K/yr
  • castrol edge 5w409K/yr
  • engine oil 5w409K/yr
  • 5w40 engine oil fully synthetic9K/yr
  • 5w-40 engine oil6K/yr
  • 5w 40w engine oil5K/yr
  • 5w 404K/yr
  • 5w40 oil4K/yr

Reviews and returns

What reviews say buyers love and hate about 5w40 Engine Oil

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

34%of positive reviews mention “Value For Money”
13%of negative reviews mention “Value For Money”
0.6%of orders come back
“While the price point is a bit higher”
A buyer, on “Value For Money”13% 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 5w40 Engine Oil questions

Answered from the same tracked data.