15w40 diesel oil
Skip it52/100strong incumbent ratings (4.8★) — 15w40 diesel oil doesn't clear our bar today.
Market/yr
$1.1M
Growth (1y)
+178.9%
Products
18
Brands
5
was 6 a year ago
Sellers
120
Price range
$14.89–$86.26
Returns
0.5%
Rating
4.8★
Skip it
Scored 52/100 across market size, growth, competition, quality gap, and returns.
Demand
Weekly Amazon search volume, last 104 weeks — +178.9% year over year.Seasonality
Monthly demand index across the year — 1.00 is average.No pronounced peak months · busiest ÷ quietest = 1.5×
Competition
- Shell Rotella85%
- Valvoline10%
- Schaeffer Manufacturing Co2%
- Mobil2%
- Royal Purple1%
- Other0%
The top 5 products take 63% of clicks — established leaders, but buyers still shop beyond them. 5 brands and 120 sellers compete here.
Brands
5 falling
was 6 a year ago
Sellers
120
Top 5 brand share
100%
Product shelf
All 18 tracked products in this niche.
Shell Rotella T6 Full Synthetic 15W-40 Diesel Engine Oil 1 Gallon (3 Pack)
Shell Rotella
$68.214.7★3,251 reviews
Shell Rotella T4 Triple Protection 15W-40 Diesel Engine Oil 1 Gallon
Shell Rotella
$15.734.7★1,623 reviews
Shell Rotella T4 Triple Protection 15W-40 Diesel Engine Oil 2.5 Gallon
Shell Rotella
$37.174.7★963 reviews
Shell Rotella T6 Full Synthetic 15W-40 Diesel Engine Oil 1 Gallon
Shell Rotella
$24.494.7★3,251 reviews
Shell Rotella T6 Full Synthetic 5W-40 Diesel Engine Oil 1 Gallon
Shell Rotella
$23.544.8★12,007 reviews
Shell Rotella T5 Synthetic Blend 15W-40 Diesel Engine Oil 1 Gallon
Shell Rotella
$20.034.8★4,415 reviews
Shell Rotella T5 Synthetic Blend 15W-40 Diesel Engine Oil 1 Gallon (3 Pack)
Shell Rotella
$57.414.8★4,415 reviews
Valvoline Heavy Duty Full Synthetic 15W-40 Diesel Engine Oil 1 Gallon
Valvoline
$22.004.8★172 reviews
Reviews
What buyers praise and complain about, mined from review topics.What buyers love
“worth it”
“Good lubricant”
“Great quality”
“Works as it should”
“seen no issues like I have with running other oils in my diesel”
“Good for all engines, including propane & NG”
“Convenient container for oil change”
“this oil for my diesel truck keeps my engine cooler”
“The bike runs well with this oil”
“Perfect size for 93 f250 7.3 oil change”
What buyers complain about
“leaking really bad”
“Was a lot cheaper then tacking to the dealer”
“Slippery and oily”
“Cheaper than Walmart and better quality”
“JUST RETIRED”
“Duramax LML STRONG”
“they can blow up your engine”
“Poor fuel filters”
“Slippery and oily”
“It was not stated in ad”
Top return reasons
- Leak-Proof53%
- Lubrication16%
- Compatibility-Overall8%
- Value For Money6%
- Advertised Vs Actual Product4%
- Defective Material/Parts3%
- Fuel Efficiency1%
- Size-Overall1%
- Material Quality1%
- Wet Cleaning1%