Skip to content

5w40 Full Synthetic Oil Diesel

Fail

The products selling today already average 4.8★, so 5w40 Full Synthetic Oil Diesel is a Fail.

Flapen Score
34
34 / 100
Ranks 6,811 of 7,287 Automotive niches · −15 vs the category median of 49
Market size
$61K/yr37K searches / yr
90-day growth
-18.3%search demand this quarter
Competition
73%top-5 click share · 10 brands · 100 sellers

Flapen Score

5w40 Full Synthetic Oil Diesel against its category

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

34Fail
Big MarketTrendingHigh ConversionOpen MarketLow ReturnsPrice rangeAvg priceNo Dominant BrandLow Review BarrierQuality Gap
This niche Category average

Market

The 5w40 Full Synthetic Oil Diesel market on Amazon at a glance

Shoppers on Amazon United States searched for 5w40 Full Synthetic Oil Diesel 37K times last year and spent an estimated $61K. The top 5 brands take 91% of clicks. Flapen scores it 34 out of 100, a Fail.

01 · Demand

An estimated 2.8% of those searches ended in a purchase.

Shoppers searched for this 37K times in the last 12 months. That counts every search on Amazon United States for this niche's terms. An estimated 2.8% of those searches ended in a purchase. Searches in the last 90 days moved -18.3% against the 90 days before. Searches, conversion and average price together put the market at an estimated $61K a year.

Searches, last 12 months
37K
Growth, 90 days vs prior 90
-18.3%
Conversion, latest week
2.8%
Market size, estimated
$61Ka year
Peak month
November1.6× the quietest month
Top search term
5w40 diesel oil27K searches a year

02 · Price

A sale here is worth $59.65.

Listings sell for $59.65 on average, from $22.00 to $163.04. Amazon reports units sold in ranges. This niche sold 3K to 3K a year. The average listing sells 100 to 250 of them. At $59.65 that is $6K to $15K a year per listing.

Average price
$59.65inside the $15 to $100 sweet spot
Price range
$22.00–$163.04
Amazon United States median price
$24.38across 115,062 niches
Units sold a year
3K–3K
Units per listing a year
100–250
Revenue per listing a year
$6K–$15K
Returns
0.6%of orders · Amazon United States median 2.1%

03 · Entry bar

The bar here is reviews.

65% of listings pay for placement with sponsored ads. 100% ship with Prime. On an average day, 0.0% of listings are out of stock. The average listing ranks #305 within Oils & Fluids. It carries 2,847 reviews at 4.78 stars, so a new listing needs social proof before a better product.

Sponsored listings
65%
Prime listings
100%
Out of stock, average day
0.0%
Average rank
#305in Oils & Fluids
Average rating
4.78 starsAmazon United States average 4.42 stars
Average reviews
2,847per listing
Listings tracked
17

04 · Newcomers

0 of last year's 1 launches cleared the first-year sales bar.

1 products launched here in the last 12 months. 0 of them cleared the first-year sales bar, our mark for a successful launch. The brands on the shelf have sold for 96 months on average, so the names here are established.

Launched, last 12 months
1
Successful launches
0Amazon's first-year sales bar
Average brand age
96 months

Products

Top 5w40 Full Synthetic Oil Diesel products & what they sell for

The products selling here, as shoppers see them on Amazon. Shelf share and sales are our estimates.

Prices and ratings read from Amazon on Jul 9, 2026. The live listing can differ.

Competition

Competition: brands, sellers & click share

The top 5 products take an estimated 73% of clicks. A locked shelf that new listings rarely crack.

$0$6K$12K$18K$24K101001K10K100K Review Count Sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

Brands

10 flat

Sellers

100

Est. top-5 brand share

91%

Top 20: 100%

Est. top-5 click share

73%

Top 20: 100%

Open market

7%

  • Shell Rotella51%
  • Valvoline18%
  • Mobil13%
  • Schaeffer Manufacturing Co6%
  • Royal Purple3%
  • Ford2%
  • Open — no brand owns it (4 brands, 7%)

Demand

5w40 Full Synthetic Oil Diesel search demand

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

900700Spike '24Holiday '24Spike '25Prime Day '25Spike '26DecMarJunAugNovMarMay

No pronounced peak months · busiest ÷ quietest = 1.6×

Search terms

Top 5w40 Full Synthetic Oil Diesel search terms shoppers use

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

  • 5w40 diesel oil27K/yr
  • 5w40 full synthetic oil diesel9K/yr
  • 5w-40 diesel engine oil1K/yr

Reviews and returns

What reviews say buyers love and hate about 5w40 Full Synthetic Oil Diesel

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

29%of positive reviews mention “Value For Money”
21%of negative reviews mention “Value For Money”
0.6%of orders come back
“Was a lot cheaper then tacking to the dealer”
A buyer, on “Value For Money”21% 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.

18 topics

NegativePositive

FAQ

Common 5w40 Full Synthetic Oil Diesel questions

Answered from the same tracked data.

Figures on this page are estimates modeled from public Amazon pages and third-party keyword data. Amazon does not supply them, and no connected seller's data is used. How we handle Amazon data