Shell Rotella T4 15w-40

Shell Rotella T4 15W-40 Heavy-Duty Diesel Engine Oil

Synthetic Blend 15W-40 Diesel Oil with Triple Protection Technology

Shell Rotella T4 15W-40 is a synthetic blend heavy-duty diesel engine oil formulated for modern low-emission diesel engines as well as older heavy-duty equipment. Its Triple Protection technology is designed to protect against wear, deposits, and oil breakdown while maintaining viscosity under demanding operating conditions.

The low-ash formulation is compatible with modern diesel emissions systems, including engines equipped with exhaust aftertreatment and diesel particulate filters. T4 15W-40 is suitable for a broad range of on-highway and off-highway applications, including fleets, construction equipment, agricultural machinery, diesel pickup trucks, and other equipment requiring an SAE 15W-40 oil with the applicable specifications.

Key Benefits

• SAE 15W-40 heavy-duty diesel engine oil
• Synthetic blend technology
• API CK-4 performance
• Triple Protection against wear, deposits, and oil breakdown
• Designed for modern low-emission diesel engines
• Compatible with diesel particulate filters and exhaust aftertreatment systems
• Helps control sludge and engine deposits
• Shear stability helps maintain viscosity and oil pressure
• Formulated for high-temperature and severe-duty operation
• Suitable for both newer and older diesel equipment
• Broad range of OEM specifications and recommendations
• Suitable for many on-highway and off-highway applications

Wear Protection

Shell Rotella T4 15W-40 is formulated to protect heavily loaded diesel engine components in demanding service.

In API CK-4 industry engine tests, Shell reports that T4 15W-40 delivered an average of 50% more wear protection than the maximum wear limits allowed by the CK-4 tests.

These results relate specifically to controlled industry testing. Actual engine wear depends on engine design, duty cycle, maintenance practices, oil-drain interval, and operating conditions.

Deposit and Sludge Control

Diesel engines can generate soot, oxidation byproducts, and other contaminants that contribute to deposits and sludge.

Rotella T4 uses optimized detergent and dispersant technology to help keep contaminants suspended and reduce deposit formation over the oil-drain interval. Maintaining engine cleanliness can help support piston, valve-train, and other lubricated-component operation.

High-Temperature and Oxidation Protection

High engine temperatures can accelerate oil oxidation and contribute to viscosity increase, deposits, and oil degradation.

Shell Rotella T4 15W-40 is formulated for increased resistance to oil breakdown under high-temperature operation. Shell testing shows oxidation resistance up to 50% longer than the previous-generation Shell Rotella T Triple Protection 15W-40 formulation.

Emissions-System Compatibility

Rotella T4 15W-40 uses a low-ash formulation designed for modern diesel engines equipped with emissions-control systems.

It is suitable for heavy-duty diesel engines using technologies such as:

• Exhaust Gas Recirculation, or EGR
• Diesel Particulate Filters, or DPF
• Exhaust aftertreatment systems
• Modern low-emission diesel engine designs

The formulation helps limit lubricant-related ash loading in diesel particulate filters while providing wear and deposit protection.

Always follow the engine manufacturer's required oil specification and viscosity grade.

Shear Stability and Viscosity Control

Heavy-duty engines can subject motor oil to significant mechanical shear.

Rotella T4 15W-40 is formulated with shear stability to help maintain its viscosity during service and support consistent oil pressure across demanding operating conditions.

Recommended Applications

Shell Rotella T4 15W-40 is suitable for a broad range of applications, including:

• Class 8 and other heavy-duty trucks
• On-highway fleets
• General haul applications
• Construction equipment
• Agricultural and farm machinery
• Mining equipment
• Logging equipment
• Public transportation
• Diesel pickup trucks
• High-power diesel engines
• Older diesel engines requiring compatible specifications
• Engines using EGR and diesel particulate filters

The current Shell Product Data Sheet also identifies use in hard-working gasoline engines where the specified viscosity and applicable API performance category are appropriate.

Current Specifications, Approvals and Recommendations

The current Shell Product Data Sheet lists the following for Rotella T4 15W-40:

• API CK-4
• API CJ-4
• API CI-4 Plus
• API CI-4
• API CH-4
• API SN
• ACEA E9
• ACEA E11
• JASO DH-2
• JASO MA
• JASO MA2
• Caterpillar ECF-2
• Caterpillar ECF-3
• Cummins CES 20086
• Cummins CES 20081
• Detroit Fluids Specification DFS 93K222
• Detroit Fluids Specification DFS 93K218
• Deutz DQC III-10 LA
• Mack EOS-4.5
• Mack EO-O Premium Plus
• MAN M 3575
• DTFR 15C100
• MTU Category 2.1
• Allison TES-439
• Volvo VDS-4.5
• Ford WSS-M2C171-F1

Because Shell groups these collectively as specifications, approvals, and recommendations, verify the exact OEM requirement for the engine being serviced rather than assuming every item represents the same type of formal approval.

Typical Physical Characteristics

Typical characteristics represent current production values and should not be treated as product specifications.

Frequently Asked Questions

What is Shell Rotella T4 15W-40?
Shell Rotella T4 15W-40 is a synthetic blend heavy-duty diesel engine oil formulated to protect against wear, deposits, and oil breakdown in modern low-emission and older diesel engines.

Is Shell Rotella T4 15W-40 synthetic or conventional oil?
The current Shell Product Data Sheet describes Rotella T4 15W-40 as using synthetic blend technology. Shell's current U.S. product information also identifies it as a proprietary synthetic blend formula.

Is Shell Rotella T4 15W-40 API CK-4?
Yes. The current Shell Product Data Sheet lists API CK-4, along with earlier diesel engine oil service categories including CJ-4, CI-4 Plus, CI-4, and CH-4.

Can Shell Rotella T4 15W-40 be used in older diesel engines?
Yes, when the engine manufacturer permits SAE 15W-40 and one of the applicable performance categories listed for T4. The current PDS includes several earlier API diesel categories in addition to CK-4.

Can Rotella T4 15W-40 be used in engines with a DPF?
Yes. Rotella T4 is formulated for modern low-emission diesel engines, including engines using diesel particulate filters and other exhaust aftertreatment systems.

Is Shell Rotella T4 15W-40 good for diesel pickup trucks?
Shell identifies diesel pickup trucks as one of the applications for T4 15W-40. The vehicle manufacturer must specify or permit SAE 15W-40 and a compatible oil performance category.

Can Shell Rotella T4 15W-40 be used in farm and construction equipment?
Yes. Agriculture, construction, mining, and other off-highway applications are specifically identified in the current Shell Product Data Sheet.

Does Shell Rotella T4 15W-40 meet Cummins CES 20086?
The current Shell Product Data Sheet lists Cummins CES 20086 and CES 20081 among its specifications, approvals, and recommendations.

Does Shell Rotella T4 15W-40 meet Ford WSS-M2C171-F1?
Yes. Ford WSS-M2C171-F1 is included in the current Shell Product Data Sheet's specifications, approvals, and recommendations.

Does Rotella T4 15W-40 meet Volvo VDS-4.5?
Yes. The current Shell Product Data Sheet lists Volvo VDS-4.5.

What is the TBN of Shell Rotella T4 15W-40?
The current PDS lists a typical Total Base Number of 10.1 mg KOH/g using ASTM D2896.

What is the pour point of Shell Rotella T4 15W-40?
The typical pour point is -36°C, according to the current Shell Product Data Sheet.

Can Shell Rotella T4 15W-40 be used in gasoline engines?
The current PDS lists API SN and identifies suitable hard-working gasoline-engine applications. Use it only where the engine manufacturer permits SAE 15W-40 and the applicable API performance category.

Does Shell Rotella T4 15W-40 meet API CL-4?
The current Rotella T4 15W-40 Product Data Sheet lists API CK-4, not API CL-4. API CL-4 has a first licensing date of January 1, 2027. Until Shell publishes an updated T4 specification confirming CL-4, this product should continue to be described as API CK-4.

What is the difference between API CK-4 and the upcoming API CL-4?
API CL-4 is scheduled to replace CK-4 as the newest backward-compatible heavy-duty diesel category beginning in 2027. CL-4 introduces updated performance requirements for next-generation diesel engines while remaining backward compatible with CK-4 applications. Current Rotella T4 15W-40 remains identified by Shell as an API CK-4 oil.