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API CJ-4 SAE 15W-40 diesel engine oil with extended drain interval for heavy-duty diesel engines
Engine Oil for Heavy-Duty Diesel Engines

API CJ-4 15W-40 Diesel Engine Oil with Extended Drain Interval

Heavy-duty fleet lubricant for wholesale and OEM supply in the B2B segment

API CJ-4 SAE 15W-40

API CJ-4 SAE 15W-40 heavy-duty diesel engine oil designed for commercial transport, multi-brand fleets, and suitable low-emission diesel engines. Ningbo MOS Chemical Co., Ltd. supports bulk supply, OEM production, private label cooperation, and export delivery through manufacturing resources backed by MOSINTER GROUP.

Viscosity stability Provides stable lubrication under load
Oxidation Control Helps slow lubricant degradation
Soot and deposit control Helps Maintain Engine Cleanliness
Fleet operation support For suitable long-haul transportation applications
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API CJ-4 15W-40 Diesel Engine Oil Description

This heavy-duty diesel engine oil API CJ-4 SAE 15W-40 is intended for appropriate commercial trucks, transport fleets, and low-emission diesel engines. Its viscosity control, oxidation resistance, detergent, dispersant, and anti-wear characteristics help ensure reliable lubrication under severe fleet operation.

For extended drain interval applications, the actual oil change interval must be determined according to the engine manufacturer's recommendations, vehicle condition, operating conditions, fuel quality, and used oil analysis results.

Key performance benefits

  • API CJ-4 performance characteristics for diesel engine oil for heavy-duty diesel engines
  • SAE 15W-40 viscosity grade
  • Helps control soot, deposits, and sludge formation
  • Ensures viscosity retention and oxidation resistance
  • Provides wear protection under severe fleet operating conditions
  • Suitable for applicable commercial vehicles and fleets

Application Area

Heavy-duty trucks
Commercial Buses
Multi-Brand Fleets
Suitable for low-emission diesel engines
Heavy-duty diesel engine lubricant for commercial fleet operations

Fleet Engine Protection

Ensures engine cleanliness, wear control, and stable lubrication for suitable commercial trucks, buses, and multi-brand fleets operating in demanding conditions.

Packaging specifications

Diesel Engine Oil API CJ-4 15W-40 4L Bulk Package
4 L × 6 bottles
API CJ-4 15W-40 Diesel Engine Oil, 18L bulk packaging
Pail 18 L

API CJ-4 15W-40 diesel oil wholesale and OEM supply

Ningbo MOS Chemical Co., Ltd. supplies heavy-duty diesel engine oil API CJ-4 SAE 15W-40 to lubricant distributors, commercial fleet operators, vehicle maintenance companies, and international automotive aftermarket importers.

Leveraging production resources supported by MOSINTER GROUP, we provide factory-coordinated manufacturing, wholesale procurement, OEM lubricant production, private label packaging, and export order support for international B2B buyers.

  • Bulk Supply for Distributors and Importers
  • Private Label and OEM Lubricant Manufacturing
  • API CJ-4 SAE 15W-40 Fleet Engine Oil Supply
  • Packaging: 4 L and 18 L
  • Custom packaging and private labeling cooperation
  • Export Documentation and International Order Support
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API CJ-4 15W-40 Diesel Engine Oil Frequently Asked Questions

Which applications is API CJ-4 15W-40 diesel engine oil suitable for?

Intended for appropriate heavy-duty diesel engines used in commercial trucks, buses, and fleet vehicles requiring API CJ-4 performance and SAE 15W-40 viscosity. Always check the required specification in the engine or equipment manual.

Can this diesel engine oil be used with extended drain intervals?

It can support suitable extended drain interval programs for fleets, but the actual oil change interval must comply with the engine manufacturer's recommendations and take into account operating conditions, fuel quality, vehicle condition, and used oil analysis.

Do you supply API CJ-4 15W-40 diesel oil wholesale?

Yes. Ningbo MOS Chemical Co., Ltd. supports wholesale purchases, bulk supply, and export cooperation for lubricant distributors, fleets, service companies, and international importers.

Is the diesel engine oil available under OEM or private label?

OEM and private label cooperation can be arranged depending on order volume, packaging format, label design, and target market requirements. Available services include custom packaging and export order support.