Top 9 15w40 Semi Synthetic Motor Oil – Motor Oils

As an Amazon Associate I earn from qualifying purchases.

1. Triax


Triax Fleet Supreme ESP 15W-40 API CK-4 Full Synthetic Diesel Engine Oil, Superb Powerstroke Performance 5 Gallon Pail, Friction Optimized and Boosted with Molybdenum and Nano-Boron

Triax #ad - Extreme drain intervals capabilities; 25, 000-mile drain interval for pickups and 80, 000 for class 8 semi-trucks. Crp organic, metallic, Moly plating technology for unsurpassed wear protection, oxidation, and high temp stability.

Friction modified and vi stabilizer pre-boosted; un-rivaled turbo-charger protection; will not create deposits and ash on turbo bearings will not fry on the turbo. Eliminates the need to clean diesel particulate filters and is for use in virtually all diesel-powered pickups and heavy-duty trucks, both pre 2007 and post 2007 models fitted with emission control systems. Contains state-of-the-art dispersal and ash control systems to keep your engine extremely clean.
BrandTriax #ad
ManufacturerTRIAX LUBRICANTS #ad
Height15 Inches
Length12 Inches
Width12 Inches
Part NumberF946

2. Lucas Oil


Lucas Oil 10299 SAE 15W-40 CJ-4 Synthetic Motor Oil, 1 Gallon

Lucas Oil #ad - Package weight : 7. 8 pounds. Fit type: Vehicle Specific. Package dimensions: 8. 38 l x 12 h x 3. 5 w inches. Country of Origin : United States.
BrandLucas Oil #ad
ManufacturerLucas Oil #ad
Height12 Inches
Length8.37 Inches
Weight7.58 Pounds
Width3.5 Inches
Part Number10299
WarrantyLimited Manufacturer

3. Valvoline


Valvoline Premium Blue SAE 15W-40 Diesel Engine Oil 1 GA, Case of 3

Valvoline #ad - Superior deposit protection compared to industry requirements. Outstanding wear protection. Strong shear stability provides stay-in-grade performance. Valvoline premium blue Engine oil is The Only One exclusively endorsed and recommended by Cummins.
BrandValvoline #ad
ManufacturerValvoline #ad
Height11.44 Inches
Length14.5 Inches
Weight24 Pounds
Width9.13 Inches
Part Number773780

4. Shell Rotella T


1 Gallon Bottles, 6 Pack, Rotella T4 15w40 Heavy Duty Motor Oil

Shell Rotella T #ad - Keeps engine clean for optimum performance. Protects against corrosion as fuel burns and oil ages. Heavy-duty diesel engine oil. Helps keep moving metal engine surfaces apart for long life.
BrandShell Rotella T #ad
ManufacturerRotella #ad
Part Number550045129

5. Castrol


Castrol 03111C GTX High Mileage 10W-40 Synthetic Blend Motor Oil, 5 Quart

Castrol #ad - Seal conditioners help reduce leaks; Bottle Color: Green. Exceeds ilsac gf-5, aPI SN. Superior detergency that helps prevent deposit build up. Advanced additives that help prevent engine wear. Superior oil burn off protection versus leading conventional oils.
BrandCastrol #ad
ManufacturerCastrol #ad
Height4.5 inches
Length11.6 inches
Width9 inches
Part Number03111C

6. Chevron


Pack of 3, Delo 400 SDE SAE Conventional Heavy Duty Diesel Engine Oil 15W-40,1 Gallon

Chevron #ad - May be used in older conventional engines and gasoline engines. Formulated with ISOSYN technology. Provides outstanding performance with ultra-low sulfur diesel and also with normal and low sulfur diesel fuels. Premium quality heavy duty motor oil manufactured in the USA. Formulated to meet the requirements of post-2007 low emission engines.
BrandChevron #ad
ManufacturerDelo #ad
Height8.4 Inches
Length13.6 Inches
Weight24.15 Pounds
Width12.4 Inches
Part Number222290388
WarrantyDelo 400

7. Mobil 1


1 Gallon Pack of 4, Mobil Super 96819 15W-40 Delvac 1300 Motor Oil

Mobil 1 #ad - Designed to deliver trouble-free, consistent performance. Right for your vehicle and lifestyle. Manufactured to meet or exceed strict quality requirements. If you have any questions or need fitment information for your vehicle, please contact with us.
BrandMobil 1 #ad
ManufacturerMobil 1 #ad
Height10 Inches
Length17 Inches
Weight20.3 Pounds
Width12 Inches
Part Number122492

8. Motul


Motul 5100 4T 15W50 Synthetic Blend Oil 4 Liters 104083

Motul #ad - Ester technology to improve engine response. Meets the following standards: API SL/SH/SG and JASO MA. Newest api rating of SL for catalytic converters. Proprietary extreme pressure formula to protect the gearbox. Recommended for all 4-stroke engines.
BrandMotul #ad
ManufacturerMotul #ad
Height11.6 Inches
Length7.1 Inches
Weight7.6 Pounds
Width3.8 Inches
Part NumberP-104083
Warrantysee motul

9. Mobil 1


5 Quart, Mobil 1 High Mileage Full Synthetic Motor Oil 10W-40, Gray

Mobil 1 #ad - Provides excellent internal engine heat protection up to 500 degrees F and low temperature protection to -30 degrees F. Meets ilsac gf-6 standards to help provide low-speed pre-ignition LSPI and timing chain wear protection while keeping your engine clean and helping to improve your fuel economy.

Utilizes mobil 1’s signature Triple Action Formula to deliver outstanding engine performance, protection, and cleanliness. Mobil 1 high mileage full-synthetic motor oil 10w-40 is designed for engines with over 75, 000 miles to go up to 10, 000 miles between oil changes. *. Helps extend engine life by working to prevent damaging deposits and sludge buildup.
BrandMobil 1 #ad
ManufacturerMobil 1 #ad
Height12.66 Inches
Length8.1 Inches
Width4.4 Inches
Part Number120771
ModelHigh Mileage
WarrantyLimited Warranty - Please contact manufacturer for full details