Best 15w40 Diesel Oil: image
Editor's Pick

SynShield Durability Advantage 15w40 engine oil is formulated to provide maximum protection against wear and tear, soot contamination and aeration. The oil has been tested in the harshest operating conditions including high-temperature applications and extreme temperatures. It also meets API CK-4 standards for diesel engines. The product is available in two grades: low-temperature and high-temperature. It can be used with or without catalysts. Notably, it was launched in 2007.

Value for Money

Engine oil manufactured in the USA. It is recommended to be used in engines with low sulfur diesel and normal fuels. The oil has a viscosity of 15W-40, which is considered “low-sulphur” by the US government. It is also recommended for use in turbocharged four-stroke diesel engines. Notably, the US government has banned the use of fossil fuels in its vehicles. Diesel engines have been banned due to stricter emission standards.

Most Discussed

State-of-the-art dispersal and ash control systems to keep your diesel engine extremely clean. The system has been designed with the aim of eliminating deposits and ash on turbochargers. It is also being used in heavy-duty trucks, which have high temperature stability due to its carbon monoxide (CO2) rating. Diesel engines are required to meet emission norms under the Clean Vehicles Act. Notably, the new regulations will be effective from July 1, 2017. The system was first introduced in 2007.

Best 15w40 Diesel Oil

Top 8 Best 15w40 Diesel Oil

1
Why we chose it
    Valvoline 773780 Premium Blue Diesel Engine Oil, 15W-40, 1-Gallon - Quantity 3: image
    94%
    customers recommend this product
    4.7/ 5
    Value for money4.6
    Mileage4.6
    2
    Why we chose it
    • 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 with ISOSYN technology
    • Formulated to meet the requirements of post-2007 low emission engines
    • May be used in older conventional engines and gasoline engines
    Delo 400 SDE SAE Conventional Heavy Duty Diesel Engine Oil 15W-40,1 Gallon, Pack of 3: image
    94%
    customers recommend this product
    4.7/ 5
    Value for money4.6
    Mileage4.5
    3
    Why we chose it
    • By improving fuel economy and reducing wear, Green Diamond Fleet Oil lowers your engine’s overall fuel consumption by up to 78 percent compared to CJ-4 spec oils
    • Hot Shot’s Secret Green Diamond uses a unique blend of Group III base oils to improve your engine’s fuel economy by up to 3 percent specialized blend gives Green Diamond formula excellent viscosity and reduces friction
    • Patented FR3 nanotechnology gets into the fine crevices of your engine to create smooth, slick surfaces that minimize metal-on-metal contact for the longest possible service life
    • Green Diamond Fleet Oil uses patented FR3 nanotechnology lubrication with CK4 Additive packaging to keep your oil clean and increase your horsepower 15W-40 engine oil excels in vehicles subjected to demanding operating conditions
    • Compared to CJ-4 spec oils, Green Diamond Fleet Oil reduces wear and tear on your engine’s components by 71 percent synthetic oil product keeps your engine free from scarring so it can run like new
    Hot Shot's Secret Green Diamond 100 Percent Synthetic 15W40 Oil Diesel 1 Gallon: image
    96%
    customers recommend this product
    4.8/ 5
    Value for money4.8
    Mileage4.8
    4
    Why we chose it
    • Motor Oil – Diesel – 15W40 – 1 gal – Set of 4
    Mobil Super 96819 15W-40 Delvac 1300 Motor Oil - 1 Gallon (Pack of 4): image
    92%
    customers recommend this product
    4.6/ 5
    Top Pick
    5
    Why we chose it
    • Friction modified with micron moly and penetrate
    • Oil durability: strong oxidation and viscosity control with less oil consumption
    • Better contamination control with superior soot-busting, deposit-dispersing capability
    • Excellent wear protection during severe operating conditions
    • Strong stay-in-grade performance throughout the life of the oil
    Schaeffer Manufacturing Co. 0700CK4-006S SynShield Durability Advantage 15W-40 Diesel Engine Oil, 1-Gallon Bottle: image
    96%
    customers recommend this product
    4.8/ 5
    Mileage4.4
    Value for money4.3
    6
    Why we chose it
    • Contains state-of-the-art dispersal and ash control systems to keep your engine extremely clean
    • Extreme drain intervals capabilities 25,000-mile drain interval for pickups and 80,000 for class 8 semi-trucks
    • 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
    • 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)
    • CRP organic, metallic, Moly plating technology for unsurpassed wear protection, oxidation, and high temp stability
    Triax Fleet Supreme ESP 15W-40 API CK-4 Full Synthetic Diesel Engine Oil, Friction Optimized and Boosted with Molybdenum and Nano-Boron, Superb Powerstroke Performance (5 Gallon Pail): image
    96%
    customers recommend this product
    4.8/ 5
    Value for money4.7
    Mileage4.6
    7

    Delo 222290428 400 SDE SAE 15W-40 Motor Oil – 5 Gallon Pail

    37 ratings | 4 offers | 37 Reviews
    Price: $139.87$153.47
    Why we chose it
    • Premium quality, heavy duty motor oil manufactured in the USA
    • Provides outstanding performance with ultra-low sulfur diesel and also with normal and low sulfur diesel fuels
    • May be used in older, conventional engines and gasoline engines
    • Formulated with ISOSYN technology
    • Formulated to meet the requirements of post-2007 low emission engines
    Delo 222290428 400 SDE SAE 15W-40 Motor Oil - 5 Gallon Pail: image
    90%
    customers recommend this product
    4.5/ 5
    8

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

    160 ratings | 17 offers | 160 Reviews
    Price: $28.22$46.88
    Why we chose it
    • Country of Origin : United States
    • Fit type: Vehicle Specific
    • Package Weight : 7.8 pounds
    • Package Dimensions: 8.38 L x 12 H x 3.5 W (inches)
    Lucas Oil 10299 SAE 15W-40 CJ-4 Synthetic Motor Oil - 1 Gallon: image
    94%
    customers recommend this product
    4.7/ 5
    Mileage4.8
    Value for money4.7
    Top Pick
    Schaeffer Manufacturing Co. 0700CK4-006S SynShield Durability Advantage 15W-40 Diesel Engine Oil, 1-Gallon Bottle
    Schaeffer's SynShield Durability Advantage 15w40 Oil is a premium advanced performance, synthetic plus, heavy-duty diesel engine oil formulated to provide maximum protection against wear, oxidation, deposit formation, soot contamination and aeration. SynShield Durability Advantage 15w40 provides excellent equipment durability and longevity even during harsh, extreme duty operating conditions. Using Schaeffer’s proprietary friction modifiers, Micron Moly and Penetro, SynShield Durability Advantage 15w40 creates a slippery, tenacious shield that prevents metal-to-metal contact. This added layer of durability protection significantly reduces wear on bearings, rings, pistons, cylinders and valve trains. SynShield Durability Advantage 15w40 Engine Oil is suitable for use in 2007 and 2010 emission complaint engines that utilize heavy exhaust gas recirculation (EGR) and exhaust after-treatment devices such as diesel particulate filters (DPFs) with or without diesel oxidation catalysts (DOCs) and selective catalytic reduction (SCR). Schaeffer's 15w40 diesel oil meets and exceeds API CK-4 specifications.
    Ranking the Brands
    Valvoline: 12.50%
    Chevron: 25.00%
    Hot Shot’s Secret: 12.50%
    Mobil 1: 12.50%
    Schaeffer Manufacturing Co: 12.50%
    Triax: 12.50%
    Lucas Oil: 12.50%

    Comparison Table

    Сomparison: Valvoline 773780 Premium Blue Diesel Engine Oil, 15W-40, 1-Gallon - Quantity 3: imageСomparison: Delo 400 SDE SAE Conventional Heavy Duty Diesel Engine Oil 15W-40,1 Gallon, Pack of 3: imageСomparison: Hot Shot's Secret Green Diamond 100 Percent Synthetic 15W40 Oil Diesel 1 Gallon: imageСomparison: Mobil Super 96819 15W-40 Delvac 1300 Motor Oil - 1 Gallon (Pack of 4): imageСomparison: Schaeffer Manufacturing Co. 0700CK4-006S SynShield Durability Advantage 15W-40 Diesel Engine Oil, 1-Gallon Bottle: imageСomparison: Triax Fleet Supreme ESP 15W-40 API CK-4 Full Synthetic Diesel Engine Oil, Friction Optimized and Boosted with Molybdenum and Nano-Boron, Superb Powerstroke Performance (5 Gallon Pail): imageСomparison: Delo 222290428 400 SDE SAE 15W-40 Motor Oil - 5 Gallon Pail: imageСomparison: Lucas Oil 10299 SAE 15W-40 CJ-4 Synthetic Motor Oil - 1 Gallon: image
    Valvoline 773780 Premium Blue Diesel Engine Oil, 15W-40, 1-Gallon – Quantity 3Delo 400 SDE SAE Conventional Heavy Duty Diesel Engine Oil 15W-40,1 Gallon, Pack of 3Hot Shot’s Secret Green Diamond 100 Percent Synthetic 15W40 Oil Diesel 1 GallonMobil Super 96819 15W-40 Delvac 1300 Motor Oil – 1 Gallon (Pack of 4)Schaeffer Manufacturing Co. 0700CK4-006S SynShield Durability Advantage 15W-40 Diesel Engine Oil, 1-Gallon BottleTriax Fleet Supreme ESP 15W-40 API CK-4 Full Synthetic Diesel Engine Oil, Friction Optimized and Boosted with Molybdenum and Nano-Boron, Superb Powerstroke Performance (5 Gallon Pail)Delo 222290428 400 SDE SAE 15W-40 Motor Oil – 5 Gallon PailLucas Oil 10299 SAE 15W-40 CJ-4 Synthetic Motor Oil – 1 Gallon
    Viscosity15w-4015w-4015w-4015W4015w-4015W-4015w-4015w-40
    BrandValvolineChevronHot Shot’s SecretMobil 1Schaeffer Manufacturing CoTriaxChevronLucas Oil
    Liquid Volume128 Fluid Ounces1 Gallons128 Fluid Ounces128 Fluid Ounces16384 Fluid Ounces128 Fluid Ounces5 Gallons3.79 Milliliters
    ManufacturerVALVOLINE OIL COMPANYDeloHot Shot’s SecretMobil 1TRIAX LUBRICANTSDeloLucas Oil
    Item Weight8.19 pounds24.2 pounds20.3 pounds38.7 pounds39.7 pounds7.58 pounds
    Product Dimensions14.5 x 9.12 x 11.44 inches13.6 x 12.4 x 8.4 inches17 x 12 x 10 inches12 x 12 x 15 inches15 x 10.7 x 9.4 inches8.37 x 3.5 x 12 inches
    Package InformationJugCanBottlePailPailJug
    Is Discontinued By ManufacturerNoNoNo
    Vehicle Service TypeDiesel engine tractors, Diesel engine heavy equipment, Diesel engine semis, Diesel engine pickupsCarHeavy Duty Diesel Trucks

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