With so many Best 15w40 Diesel Oil brands on the market – from big names like Chevron,Shell Rotella,Cam2 to smaller companies – finding the right product can be a real challenge. But we’re here to make your search easier.
We carefully researched and tested a vast range of Best 15w40 Diesel Oil to help you discover the top contenders that match different needs and preferences. Altogether, we spent over 100 hours evaluating numerous products first-hand.
Our #1 best Best 15w40 Diesel Oil is Chevron Best 15w40 Diesel Oil, based on its stellar performance across all our tests. Below you’ll find more of our top-rated recommendations for great Best 15w40 Diesel Oil options currently available. Make sure to check out our buying guide too – it’s full of expert advice for choosing a Best 15w40 Diesel Oil tailored to exactly what you’re looking for. With our help guiding your decision, finding your perfect fit will be a breeze!
Editor's Choice
Shell Rotella T6 Full Synthetic 15W-40 Motor Oil, 1 Gallon (3 Pack)
Premium Pick
Delo 400 XLE Heavy Duty Synblend Diesel Engine Oil 15W-40, 1 Gallon, Pack of 1
Budget Pick
CAM2 Super HD Synthetic Blend 15W-40 CK-4 Heavy Duty Diesel Engine Motor Oil, 5 Gallon Pail
Top 10 Best 15w40 Diesel Oil
We researched and compared the top products in the Best 15w40 Diesel Oil category to provide you with these recommendations.
1. Delo 400 XLE Heavy Duty Synblend Diesel Engine Oil 15W-40, 1 Gallon, Pack of 1
- A premium synthetic blend, long drain mixed-fleet engine oil specifically formulated for on- highway applications, including 2017 greenhouse gas (GHG 17) compliant diesel engines
- Isosyn Advanced Technology: The Next Generation of Heavy Duty Engine Oil Chemistry - engineered to deliver longer oil life, better wear protection and longer engine life
- Isoclean: Certified clean - ensure your lubricants meet OEM cleanliness requirements to help you minimize downtime, reduce maintenance costs and extend equipment life
- Provides high performance piston deposit control and turbocharger protection due to its superb oxidation performance. Its high performing detergent and dispersant additives provide excellent diesel engine component protection.
- Exceptional soot dispersancy and wear control - Cylinders, pistons, rings, and valve train components are well protected against wear and corrosion, providing optimum service life and minimal maintenance, contributing to maximum equipment utilization and minimal downtime.
2. Shell Rotella T6 Full Synthetic 15W-40 Motor Oil, 1 Gallon (3 Pack)
- Full synthetic 15W-40 diesel engine oil with Triple Protection Plus technology protects against wear, deposits, and oil breakdown
- Formulated to deliver increased protection against oxidation and enhanced deposit control/cleanliness
- Better cold cranking properties and low-temperature pumpability (compared to conventional and synthetic blend 15W-40 motor oil)
- Improved wear performance versus API CJ-4 technology
- Compatibility with exhaust emissions control systems
- Protection in extreme operating conditions and climates
- Limited warranty valid up to 15 years or 500,000 miles (whichever comes first) if you exclusively use Shell Rotella T6 Full Synthetic Technology heavy-duty engine oil*
- Meets or exceeds the following industry requirements: API CK-4, CJ-4, CI-4 Plus, CI-4, SN; ACEA E11; JASO DH-2, MA/MA2
- Meets or exceeds the following OEM specifications: Caterpillar ECF-2/ECF-3; Cummins CES 20086, 20081; Detroit Fluids Specification (DFS) 93K222, 93K218; DTFR 15C100 (prev. MB 228.31); MACK EOS-4.5; MAN M 3775; Ford WSS-M2C171-F1; Allison TES 439; Volvo VDS-4.5
- For a full list of equipment approvals and recommendations, please consult your local Shell Technical Help Desk and always consult your owners manual
3. CAM2 Super HD Synthetic Blend 15W-40 CK-4 Heavy Duty Diesel Engine Motor Oil, 5 Gallon Pail
- SYNTHETIC BLEND FORMULA: CAM2 Super HD 15W-40 combines synthetic and conventional base oils for enhanced protection and performance in heavy duty diesel engines
- CK-4 SPECIFICATION: Meets API CK-4 service category requirements for modern diesel engines including those with diesel particulate filters and emission control systems
- HEAVY DUTY PROTECTION: Formulated specifically for hard-working diesel engines in trucks, construction equipment, and agricultural machinery requiring SAE 15W-40 viscosity grade
- MULTI-SEASON PERFORMANCE: 15W-40 viscosity provides reliable cold weather starting and high temperature protection for year-round use in demanding applications
- BULK QUANTITY: Convenient 5 gallon (18.9 liter) pail provides ample supply for multiple oil changes or fleet maintenance operations
4. Shell Rotella T4 Triple Protection 15W-40 Motor Oil, 1 Gallon (3 Pack)
- 15W-40 diesel engine oil with Triple Protection technology protects against wear, deposits, and oil breakdown
- Provides significantly better wear protection than previous generation oils to maximize engine efficiency and prolong engine life
- Formulated with advanced additive technology plus synthetic base oil for enhanced deposit control and superior engine cleanliness throughout the oil drain interval
- Enhanced shear stability for better viscosity control and optimal engine oil pressure
- Outstanding protection for heavy-duty diesel engines, including the latest emission-controlled engines using EGR and containing a diesel particulate filter
- Suitable for use in agricultural, mining, logging, and construction applications, plus diesel pick-up trucks
- Meets or exceeds the following industry requirements: API CK-4, CJ-4, CI-4 Plus, CI-4, CH-4, SN; ACEA E11; JASO DH-2, MA, MA2
- Meets or exceeds the following OEM specifications: Caterpillar ECF-2, ECF-3; Cummins CES 20086, 81; Detroit Fluids Specification (DFS) 93K222, 93K218; Deutz DOC III-10 LA; MACK EOS-4.5, EO-O Premium Plus; MAN M 3575; DTFR 15C100 (prey. MB 228.31); MTU Category 2.1; Allison TES-439; Volvo VDS-4.5, VDS-4; Ford WSS-M2C171-F1
- For a full list of equipment approvals and recommendations, please consult your local Shell Technical Help Desk and always consult your owners manual
5. Shell Rotella T5 Synthetic Blend 15W-40 Motor Oil, 1 Gallon (3 Pack)
- Synthetic blend 15W-40 diesel engine oil with Triple Protection Plus technology protects against wear, deposits, and oil breakdown
- Ideal for on-highway fleets, construction, and agricultural machinery, and diesel pickup trucks including high-power vehicles that require resistance to heat and stress
- Triple Protection Plus technology offers better low-temperature flow, which delivers excellent equipment protection, long engine life, and maintains viscosity control under high temperatures
- Delivers good engine cleanliness and protection against piston deposits, ensuring engine and component reliability at extended oil drain intervals
- Advanced low-ash formulation helps control the blocking or poisoning of exhaust after-treatment devices, helping maintain vehicle emission compliance and engine fuel efficiency
- Controls engine wear 37 percent better than the maximum wear requirements in API CK-4 engine wear tests
- Limited warranty valid up to 10 years or 300,000 miles (whichever comes first) if you exclusively use Shell Rotella T5 Synthetic Blend heavy-duty engine oil*
- Meets or exceeds the following industry specifications: API CK-4, CJ-4, CI-4 PLUS, CI-4, CH-4, SN; ACEA E11; JASO DH-2
- Meets or exceeds the following OEM specifications: Caterpillar ECF-2, ECF-3; Cummins CES 20086, 20081; Detroit Fluid Specification (DFS) 93K222, 93K218; Allison TES 439; DTFR 150100 (prey. MB 228.31); Deutz DOC III-18 LA; Ford WSS-M2C171-F1; MACK EO-S 4.5, EO-O Premium Plus; MAN M 3775; MTU Category 2.1; Volvo VDS 4.5, VDS-4
- For a full list of equipment approvals and recommendations, please consult your local Shell Technical Help Desk and always consult your owners manual
6. Shell Rotella T6 Full Synthetic 15W-40 Diesel Engine Oil, 1 Gallon
- Full synthetic 15W-40 diesel engine oil with Triple Protection Plus technology protects against wear, deposits, and oil breakdown
- Formulated to deliver increased protection against oxidation and enhanced deposit control/cleanliness
- Better cold cranking properties and low-temperature pumpability (compared to conventional and synthetic blend 15W-40 motor oil)
- Improved wear performance versus API CJ-4 technology
- Compatibility with exhaust emissions control systems
- Protection in extreme operating conditions and climates
- Limited warranty valid up to 15 years or 500,000 miles (whichever comes first) if you exclusively use Shell Rotella T6 Full Synthetic Technology heavy-duty engine oil*
- Meets or exceeds the following industry requirements: API CK-4, CJ-4, CI-4 Plus, CI-4, SN; ACEA E11; JASO DH-2, MA/MA2
- Meets or exceeds the following OEM specifications: Caterpillar ECF-2/ECF-3; Cummins CES 20086, 20081; Detroit Fluids Specification (DFS) 93K222, 93K218; DTFR 15C100 (prev. MB 228.31); MACK EOS-4.5; MAN M 3775; Ford WSS-M2C171-F1; Allison TES 439; Volvo VDS-4.5
- For a full list of equipment approvals and recommendations, please consult your local Shell Technical Help Desk and always consult your owners manual
7. Motivity Heavy Duty 15W-40 Synthetic Oil Change Kit Compatible With Ford F250 F350 F450 F550 Super
- Complete Diesel Oil Change Kit Includes 15W40 synthetic blend oil and a compatible oil filter for one full oil change.
- Engineered for Diesel Engines Designed to meet the needs of 6.0L & 6.4 engines in Ford trucks (20032010).
- Heavy-Duty Protection Fights sludge, oxidation, and wear to keep your diesel engine clean and running efficiently under extreme conditions.
- High-Performance Synthetic Blend Delivers the durability of conventional oil with the added protection and stability of synthetic technology.
- Reliable Fitment Designed to meet or exceed OEM specifications for filtration and oil performance, ensuring easy installation and trusted protection.
8. Valvoline Heavy Duty Full Synthetic 15W-40 Diesel Engine Oil 1 Gallon
- Full synthetic formula is proven to maximize diesel engine life
- 35% reduction in valve train wear vs. industry standards as tested in Cummins ISB engine test
- Engineered to control wear, deposits and oil breakdown while meeting low emission requirements
- Up to 28% longer oil life vs. industry standards as tested in Volvo T-13 engine test
- Ultimate protection against severe temperatures
- Meets or exceeds requirements of API Service CK-4, CJ-4, CI-4 PLUS, CI-4, CH 4, & SN and approved or recommended for Cummins CES 20086, Ford WSS-M2C171-F1, Volvo VDS-4.5, Mack EOS-4.5, Detroit Diesel DFS 93K222, and Caterpillar ECF-3
9. Shell Rotella T5 Synthetic Blend 15W-40 Diesel Engine Oil, 1 Gallon
- Synthetic blend 15W-40 diesel engine oil with Triple Protection Plus technology protects against wear, deposits, and oil breakdown
- Ideal for on-highway fleets, construction, and agricultural machinery, and diesel pickup trucks including high-power vehicles that require resistance to heat and stress
- Triple Protection Plus technology offers better low-temperature flow, which delivers excellent equipment protection, long engine life, and maintains viscosity control under high temperatures
- Delivers good engine cleanliness and protection against piston deposits, ensuring engine and component reliability at extended oil drain intervals
- Advanced low-ash formulation helps control the blocking or poisoning of exhaust after-treatment devices, helping maintain vehicle emission compliance and engine fuel efficiency
- Controls engine wear 37 percent better than the maximum wear requirements in API CK-4 engine wear tests
- Limited warranty valid up to 10 years or 300,000 miles (whichever comes first) if you exclusively use Shell Rotella T5 Synthetic Blend heavy-duty engine oil*
- Meets or exceeds the following industry specifications: API CK-4, CJ-4, CI-4 PLUS, CI-4, CH-4, SN; ACEA E11; JASO DH-2
- Meets or exceeds the following OEM specifications: Caterpillar ECF-2, ECF-3; Cummins CES 20086, 20081; Detroit Fluid Specification (DFS) 93K222, 93K218; Allison TES 439; DTFR 150100 (prey. MB 228.31); Deutz DOC III-18 LA; Ford WSS-M2C171-F1; MACK EO-S 4.5, EO-O Premium Plus; MAN M 3775; MTU Category 2.1; Volvo VDS 4.5, VDS-4
- For a full list of equipment approvals and recommendations, please consult your local Shell Technical Help Desk and always consult your owners manual
10. Valvoline Premium Blue One Solution SAE 15W-40 Diesel Engine Oil 1 GA
- EXCELLENT WEAR PROTECTION IN HEAVY DUTY APPLICATIONS that can take a toll on critical internal moving parts
- RESISTS OXIDATION AND FIGHTS DEPOSITS with high quality base oils and special inhibitors
- PROTECTS DURING COLD START UPS WHILE CONTROLING SOOT as heavy-duty equipment can sit idle for extended periods of time
- PROPRIETARY ONE SOLUTION GEN2 TECHNOLOGY designed to protect hardworking diesel, gasoline and natural gas engines in both on-highway and off-highway applications
- UNIQUE 5,000 MILES OIL DRAINS EXTENSION in Cummins X15/X12 engines when average is 7mpg or higher
- AMERICAN MADE & FORMULATED to maximize your engines life and improve its performance
- THE ONLY ONE exclusively endorsed and recommended by Cummins
Peter
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