Top 9 15W40 Oil Synthetic – Motor Oils

As an Amazon Associate I earn from qualifying purchases.

1. Valvoline

#ad

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

#ad
Valvoline #ad - Superior deposit protection compared to industry requirements. Outstanding wear protection. Valvoline premium blue Engine oil is The Only One exclusively endorsed and recommended by Cummins. Strong shear stability provides stay-in-grade performance.
BrandValvoline #ad
ManufacturerValvoline #ad
Height11.44 Inches
Length14.5 Inches
Weight24 Pounds
Width9.13 Inches
Part Number773780
Model773780

2. Lucas Oil

#ad

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

#ad
Lucas Oil #ad - Fit type: Vehicle Specific. Package dimensions: 8. 38 l x 12 h x 3. 5 w inches. Country of Origin : United States. Package weight : 7. 8 pounds.
BrandLucas Oil #ad
ManufacturerLucas Oil #ad
Height12 Inches
Length8.37 Inches
Weight7.58 Pounds
Width3.5 Inches
Part Number10299
Model10299
WarrantyLimited Manufacturer

3. Shell Rotella

#ad

Case of 3, Shell Rotella T5 Synthetic Blend 15W-40 Diesel Engine Oil 1 Gallon

#ad
Shell Rotella #ad - Controls engine wear 37 percent better than the maximum wear requirements in API CK-4 engine wear tests. Improved oxidation performance for increased resistance to oil breakdown under high temperatures compared to the previous formulation.

Ideal for on-highway fleets, construction, and agricultural machinery, and diesel pickup trucks — including high-power vehicles that require resistance to heat and stress. Case of three 1-gallon bottles with ergonomic design for easy handling and pouring. Improves low-temperature flow compared to conventional 15W-40 oils. Synthetic blend 15w-40 diesel engine oil with Triple Protection Plus technology protects against wear, deposits, and oil breakdown. Helps control engine deposits for reliability at extended oil drain intervals always follow the OEM recommended oil drain interval.
BrandShell Rotella #ad
ManufacturerShell Rotella #ad
Weight24 Pounds
Part Number550045348-3PK
Model550045348-3PK
WarrantySee manufacturer's label

4. Shell Rotella

#ad

Case of 3, Shell Rotella T6 Full Synthetic 15W-40 Diesel Engine Oil 1-Gallon

#ad
Shell Rotella #ad - Full synthetic 15w-40 diesel engine oil with Triple Protection Plus technology protects against wear, deposits, oil breakdown, and improves low-temperature flow. Enhanced fuel economy capability of 1. 5 percent without compromising engine protection or durability compared to 15W-40 oils.

Better cold-cranking properties and low-temperature pumpability for reaching critical engine parts faster. Advanced low ash formulation helps protect the exhaust catalysts and particulate filters found on the latest low-emission vehicles. Case of three 1-gallon bottles with ergonomic design for easy handling and pouring.

Increased shear stability for better viscosity control and optimal engine oil pressure. Exceptional wear protection for longer life in a wide range of heavy-duty engine applications — from pickup trucks to tractors to semi rigs. Multi-functional dispersant additives provide an enhanced level of protection against the effects of soot, dirt, and other contaminants compared to previous formulation.
BrandShell Rotella #ad
ManufacturerRotella #ad
Part Number550050467-3PK
Model550050467-3PK
WarrantyLimited

5. Royal Purple

#ad

1 Gallon, Royal Purple 04154 Duralec Super SAE 15W-40 API CK-4 High Performance Diesel Motor Oil

#ad
Royal Purple #ad - Recommeded for engines specifying apI service CI-4, CI-4 Plus, CJ-4, and CK-4. Robust detergents remove deposits and maintain engine cleanliness. Superior corrosion protection. Fit type: Universal Fit. Greatly extends oil drain intervals. Top quality synthetic base oils provide excellent cold flow and protection at all operating temperatures.
BrandRoyal Purple #ad
ManufacturerROYAL PURPLE #ad
Height7 Inches
Length5 Inches
Weight7.67 Pounds
Width10 Inches
Part Number04154
ModelROY04154

6. ULTRA 1PLUS

#ad

API CK-4/SN | 5 Gallon Pail, Ultra1Plus SAE 15W-40 Full Synthetic Heavy-Duty Motor Oil

#ad
ULTRA 1PLUS #ad - Minimizes Oil Consumption. Engine wear protection. Strong shear stability provides stay-in-grade performance. Resistant to viscosity and thermal breakdown at high temperatures. Enhanced oxidation control.
BrandULTRA 1PLUS #ad
ManufacturerUltrachem LLC #ad
Height15 Inches
Length12 Inches
Weight38 Pounds
Width12 Inches
Part NumberUFS1540CK4SNP
ModelUFS1540CK4SNP

7. Shell Rotella

#ad

Shell Rotella T6 Full Synthetic 5W-40 Diesel Engine Oil 1-Gallon, Case of 3

#ad
Shell Rotella #ad - Full synthetic 5w-40 diesel engine oil with Triple Protection Plus technology protects against wear, deposits, oil breakdown, and improves low-temperature flow. Case of three 1-gallon bottles with ergonomic design for easy handling and pouring.

Enhanced fuel economy capability of 1. 5 percent without compromising engine protection or durability compared to 15W-40 oils. Increased shear stability for better viscosity control and optimal engine oil pressure. Advanced low ash formulation helps protect the exhaust catalysts and particulate filters found on the latest low-emission vehicles. Better cold-cranking properties and low-temperature pumpability for reaching critical engine parts faster.

Multi-functional dispersant additives provide an enhanced level of protection against the effects of soot, dirt, and other contaminants compared to previous formulation. Exceptional wear protection for longer life in a wide range of heavy-duty engine applications — from pickup trucks to tractors to semi rigs.
BrandShell Rotella #ad
ManufacturerRotella #ad
Weight23.55 Pounds
Part Number550045347-3PK
Model550045347-3PK
Warranty1 year limited

8. Royal Purple

#ad

Royal Purple 04154 / 300905 Duralec Super 15W40 CK-4 Motor Oil Synthetic, 1 gal. Case of 3

#ad
Royal Purple #ad - Royal purple 44154 api-licensed sae 15w-40 high performance Synthetic Motor Oil - 1 Gallon Jug, Pack of 3, Superior corrosion protection. For best performance, follow the manufacturer's recommendations in your vehicle owner’s manual. Increased fuel efficiency. Better protection of the expensive catalytic emission system. Improved compatibility with fuels containing ethanol. Better wear protection.
BrandRoyal Purple #ad
ManufacturerROYAL PURPLE #ad
Height8 Inches
Length15 Inches
Weight24 Pounds
Width9 Inches
Part Number44154
Model44154

9. Triax

#ad

Mack, DD 5 Gallon Pail, Heavy Duty Diesel Engine Oil, Cummins, OEM Compatible with Volvo, Moly and Boron Performance Boosted, Triax Fleet Ultra ESP 15W-40 API CK-4 Licensed Synthetic Blend

#ad
Triax #ad - Contains built-in performance boosters for friction reduction, oxidation inhibition, shear, and viscosity stability. This product is backwards compatible with virtually all heavy-duty diesel engines from all years on both US, CI-4, Japanese and European heavy-duty trucks and equipment including previous CJ-4, and CI-4 Plus specifications.

Drain capabilities exceed 12, and 40, 000 miles for in city, 0000 miles for class 8 highway trucks, 000 miles for farm trucks, 65, mixed traffic heavy-duty diesel trucks. Nano borate and organic molybdenum reinforced for outstanding wear reduction and heat management; eliminates stiction and injector issues; frees most stuck piston rings; contains state-of-the-art dispersal and ash control systems to keep your engine extremely clean. Api licensed synthetic blend product for the latest API CK-4 New CK-4 spec.
BrandTriax #ad
ManufacturerTRIAX LUBRICANTS LLC #ad
Height15 Inches
Length12.4 Inches
Weight38 Pounds
Width12.4 Inches
Part NumberTRXULT1540CK