Castrol CRB 10w-30 Diesel Engine Oil

Castrol CRB 10W-30 CK-4 Diesel Engine Oil

Synthetic Blend SAE 10W-30 Heavy-Duty Diesel Engine Oil

Castrol CRB 10W-30 CK-4 is a synthetic blend, multi-purpose heavy-duty diesel engine oil formulated for engines that require SAE 10W-30 and API CK-4 or an applicable earlier diesel engine oil category.

Designed for a variety of applications and duty cycles, Castrol CRB 10W-30 contains cleaning agents that help control deposits, antioxidants that help resist oil thickening, and a shear-stable formulation designed to protect against viscosity loss during service. These characteristics help support engine protection as modern diesel engines operate under higher temperatures, pressures, and loads.

Castrol lists drain intervals of up to 50,000 miles or 500 operating hours when supported by a comprehensive used oil analysis program. Actual service intervals should follow the engine manufacturer's recommendations and consider operating conditions, duty cycle, maintenance history, and oil analysis.

Key Benefits

• Synthetic blend SAE 10W-30 heavy-duty diesel engine oil
• Recommended for diesel engines requiring API CK-4 or earlier compatible categories
• Contains cleaning agents that help control engine deposits
• Contains antioxidants that help resist oxidation and oil thickening
• Provides shear stability to help protect against viscosity loss
• Designed for a wide range of operating conditions and duty cycles
• Supports extended drain intervals when validated through used oil analysis
• Meets specifications from Caterpillar, Cummins, Detroit Diesel, Daimler Truck, Ford, Mack, Renault Trucks, and Volvo

Applications

Castrol CRB 10W-30 CK-4 is designed for heavy-duty diesel engines where the manufacturer specifies an SAE 10W-30 lubricant meeting API CK-4 or another supported OEM specification.

It is suitable for a variety of diesel applications and duty cycles where deposit control, oxidation resistance, viscosity stability, and dependable engine protection are important.

Always verify the required SAE viscosity grade, API service category, OEM specification, and oil-change interval in the engine or equipment manufacturer's service documentation before use.

Performance Specifications

• API: CK-4
• Caterpillar: ECF-3
• Cummins: CES 20086
• Detroit Diesel: DFS 93K222
• DTFR: 15C100 (MB 228.31)
• Ford: WSS-M2C171-F1
• Mack: EOS-4.5
• Renault Trucks: RLD-3
• Volvo: VDS-4.5

Deposit Control

Diesel engine operation can produce contaminants and deposits that accumulate on internal engine surfaces. Castrol CRB 10W-30 CK-4 contains cleaning agents designed to help displace particles that could otherwise contribute to deposit formation.

Oxidation and Oil Thickening Control

Higher engine temperatures can accelerate lubricant oxidation and increase oil viscosity over time. Castrol CRB contains antioxidants designed to help interrupt the chemical reactions associated with oxidation and oil thickening.

Shear Stability and Viscosity Protection

Heavy-duty operation can subject engine oil to mechanical shear. Castrol CRB 10W-30 CK-4 is formulated to provide shear stability and help protect against viscosity loss, supporting consistent lubrication throughout the service interval.

Extended Drain Intervals

Castrol states that CRB 10W-30 CK-4 can support drain intervals up to:

• 50,000 miles
• 500 operating hours

Castrol specifies that extending oil drain intervals should only be done in conjunction with a comprehensive used oil analysis program such as Castrol Labcheck. These values should not be treated as universal drain intervals. Follow the engine manufacturer's recommendations and establish extended intervals based on operating conditions and oil analysis.

Why Choose 10W-30 Diesel Engine Oil?

SAE 10W-30 may be specified in heavy-duty diesel applications where the engine manufacturer calls for this viscosity grade. Compared with heavier viscosity grades, the correct 10W-30 formulation can provide the viscosity characteristics the engine was designed to operate with across startup and normal operating temperatures.

The viscosity grade should always be selected according to the engine manufacturer's recommendations rather than substituted based only on API category.

Frequently Asked Questions

Is Castrol CRB 10W-30 synthetic?
Castrol CRB 10W-30 CK-4 is a synthetic blend heavy-duty diesel engine oil.

Does Castrol CRB 10W-30 meet API CK-4?
Yes. API CK-4 is listed in the current Castrol product performance specifications.

What is Castrol CRB 10W-30 used for?
It is designed for heavy-duty diesel engines that require SAE 10W-30 and API CK-4 or another compatible OEM specification supported by Castrol.

Does Castrol CRB 10W-30 help control engine deposits?
Yes. Castrol states that the formulation contains cleaning agents designed to help displace particles that could otherwise build up on engine surfaces and contribute to deposits.

Does Castrol CRB 10W-30 resist oil thickening?
The formulation contains antioxidants designed to help disrupt the chemical reactions that can contribute to oxidation and oil thickening.

How long can Castrol CRB 10W-30 go between oil changes?
Castrol lists drain intervals up to 50,000 miles or 500 operating hours, but specifies that extended drains should only be used with a comprehensive used oil analysis program. Always follow the engine manufacturer's maintenance requirements.

Does Castrol CRB 10W-30 meet Cummins CES 20086?
Yes. Cummins CES 20086 is listed in the current Castrol performance specifications.

Does Castrol CRB 10W-30 meet Volvo VDS-4.5?
Yes. Volvo VDS-4.5 is listed by Castrol for this product.

Does Castrol CRB 10W-30 meet Mack EOS-4.5?
Yes. Mack EOS-4.5 is included in the current product performance list.

Does Castrol CRB 10W-30 meet Detroit Diesel DFS 93K222?
Yes. Detroit Diesel DFS 93K222 is listed in the current Castrol PDS.

Does Castrol CRB 10W-30 meet DTFR 15C100?
Yes. Castrol lists DTFR 15C100, corresponding to MB 228.31, in the product performance specifications.

Does Castrol CRB 10W-30 meet Ford WSS-M2C171-F1?
Yes. Castrol states that the product meets Ford WSS-M2C171-F1.

Does Castrol CRB 10W-30 meet Caterpillar ECF-3?
Yes. Caterpillar ECF-3 is listed among the product's performance specifications.

Can I use Castrol CRB 10W-30 instead of 15W-40 diesel oil?
Only when SAE 10W-30 is specified or permitted by the engine manufacturer. Matching the API category does not make different viscosity grades automatically interchangeable.