With numerous Best Synthetic Engine Oil For Diesel Engines brands to select from – including big names like Shell Rotella,Chevron,Valvoline – picking the right product can feel overwhelming. But we’re here to simplify your search for the perfect Best Synthetic Engine Oil For Diesel Engines.
We thoroughly tested and evaluated a wide range of top Best Synthetic Engine Oil For Diesel Engines contenders to help you navigate the crowded market. Our stand-out favorite is Shell Rotella Best Synthetic Engine Oil For Diesel Engines for its unparalleled quality and top-tier features. Below you’ll discover more of our top-rated Best Synthetic Engine Oil For Diesel Engines picks currently available.
Make sure to consult our buying guide too for valuable insights on choosing the ideal product for your needs. It covers all the key factors when shopping for a Best Synthetic Engine Oil For Diesel Engines. With our research backing your decision, you can confidently invest in a Best Synthetic Engine Oil For Diesel Engines you’ll truly love.
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
Valvoline Heavy Duty Full Synthetic 15W-40 Diesel Engine Oil 1 Gallon
Top 10 Best Synthetic Engine Oil For Diesel Engines
We researched and compared the top products in the Best Synthetic Engine Oil For Diesel Engines category to provide you with these recommendations.
1. 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
2. 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.
3. 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
4. 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
5. Shell Rotella T6 Full Synthetic 5W-40 Motor Oil, 1 Gallon (3 Pack)
- Full synthetic 5W-40 diesel engine oil with Triple Protection Plus technology protects against wear, deposits, and oil breakdown
- Improved wear performance with significantly increased level of protection against harmful engine wear (compared to previous generation API CJ-4 engine oils)
- Enhanced fuel economy capability of 1.5% without compromising engine protection or durability (compared to 15W-40 oils)
- Multi-functional dispersant additives provide an enhanced level of protection against the effects of soot, dirt, and other contaminants
- Resists breakdown by heat to provide continuous protection throughout the service interval, and also provides improved low-temperature flow compared to conventional 15W-40 oils
- Advanced low-ash formulation helps control blocking of or poisoning of exhaust after-treatment devices
- 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 specifications: API CK-4, CJ-4, CI-4 PLUS, CI-4, CH-4; ACEA E11; JASO DH-2, MA, MA2
- Meets or exceeds the following OEM specifications: Cummins CES 20086, 2008; Volvo VDS-4.5, VDS-4; MACK EOS-4.5; Detroit Fluid Specification (DFS) 93K222, 93K218; Caterpillar ECF-2, ECF-3; MAN M3575; Allison TES-439; DTFR 15C100 (prev. MB 228.31); 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
6. 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
7. Mobil Delvac 1 Advanced Full Synthetic Diesel Engine Oil 5W-30, 1 Gal
- Advanced full synthetic diesel engine oil that helps to extend engine life and fuel economy potential* of modern diesel engines operating in severe conditions
- Formulated to help high-performance diesel engines with turbocharger, direct-injection, low-emission designs, and low-sulfur and biodiesel fuel formulations
- Provides excellent oxidation performance, anti-wear, and anti-scuff properties that helps to reduce engine deposits and keep engines running reliably
- Excellent low-temperature performance for increased oil flow to critical bearing surfaces at startup and controlling low-temperature sludge formation
- Provides outstanding protection against oil thickening and degradation, helping to reduce the number of oil changes and oil disposal needs
8. Valvoline Heavy Duty Full Synthetic 15W-40 Diesel Engine Oil 1 GA, Case of 3
- 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
- American made and formulated, from the Original Motor Oil brand trusted for more than 150 years
9. Valvoline Heavy Duty Synthetic Blend 15W-40 Diesel Engine Oil 1 GA, Case of 3
- Heavy duty synthetic blend with targeted additive technology for critical component protection in extreme operating conditions and temperatures
- 35% better wear protection vs. industry standard in Cummins ISB engine test
- Designed for extended oil life in high heat
- Engineered to control wear, deposits and oil breakdown while meeting low emission requirements
- Proven to maximize diesel engine life
- 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
10. Valvoline Premium Blue Extreme SAE 5W-40 Full Synthetic Diesel Engine Oil 1 GA, Case of 3
- EXCELLENT WEAR PROTECTION IN HEAVY DUTY APPLICATIONS that can take a toll on critical internal moving parts
- RESISTS OXIDATION AND FIGHTS DEPOSITS & SLUDGE with higher quality synthetic 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
- ADVANCED FUEL ECONOMY up to 1.5% over 15W-40 conventional oils in on-highway operations
- 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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