Home > Product Catalog > Automotive lubricants > Engine Oil > Diesel engine oil > API CI-4 15W-40 / 20W-50 Diesel Engine Oil
API CI-4 15W-40 and 20W-50 Heavy-Duty Diesel Engine Oil
Engine Oil for Heavy-Duty Diesel Engines

API CI-4 15W-40 / 20W-50 Diesel Engine Oil

Manufacturer and Export Supplier of Diesel Engine Oil for B2B

API CI-4 SAE 15W-40 SAE 20W-50

Heavy-duty diesel engine oil API CI-4, designed for commercial trucks, buses, and other diesel-powered vehicles. Ningbo MOS Chemical Co., Ltd. supports bulk supply, OEM production, private label partnerships, and international distributor procurement.

Consistent Lubrication Ensures engine operation under severe conditions
Detergent-dispersancy Helps control deposits and sludge
Thermal stability Maintains performance under demanding conditions
Wear protection Helps Protect Critical Engine Components
Send Inquiry

API CI-4 Diesel Engine Oil Description

This API CI-4 diesel engine oil is available in SAE 15W-40 and SAE 20W-50 viscosity grades for heavy-duty commercial diesel engines. Balanced detergency, dispersancy, and anti-wear properties help control deposits, sludge, and wear under severe fleet operation.

Ningbo MOS Chemical Co., Ltd. supplies this product to lubricant distributors, fleet maintenance companies, automotive service enterprises, and international importers. Large-volume orders, OEM production, private label packaging, and export cooperation are available.

Key performance benefits

  • Meets API CI-4 performance requirements
  • Available in SAE 15W-40 and SAE 20W-50 viscosity grades
  • Helps control soot, deposits, and sludge formation
  • Provides wear protection for heavy-duty diesel engines
  • Provides stable lubrication under severe operating conditions
  • Suitable for servicing commercial trucks, buses, and fleets

Application Area

Heavy-duty trucks
Commercial Buses
Commercial diesel engines
Lubrication and wear protection for heavy-duty diesel engines

Engine Protection in Severe Operating Conditions

Formulated to deliver engine cleanliness, wear control, and stable lubrication in trucks, buses, and other commercial diesel applications.

Packaging specifications

API CI-4 Diesel Engine Oil 4L Wholesale Packaging
4 L × 6 bottles
API CI-4 diesel engine oil, 18L bulk packaging
Pail 18 L

API CI-4 Diesel Engine Oil Wholesale and OEM Supply

Ningbo MOS Chemical Co., Ltd. supplies API CI-4 diesel engine oil for international B2B buyers, lubricant distributors, fleet maintenance companies, and automotive parts importers. MOSINTER GROUP integrates investment production resources to ensure stable manufacturing, packaging, and export cooperation.

  • Bulk Supply for Distributors and Importers
  • Private Label and OEM Lubricant Manufacturing
  • SAE 15W-40 and SAE 20W-50 Viscosity Grades
  • Packaging: 4 L and 18 L
  • Export Documentation and International Order Support
  • Long-term supply partnership for regional lubricant distributors
Send Inquiry

Frequently asked questions about API CI-4 diesel engine oil

What viscosity grades are available for this API CI-4 diesel engine oil?

This product is available in SAE 15W-40 and SAE 20W-50 viscosity grades. The appropriate grade should be selected according to the engine manufacturer's recommendations, operating conditions, and application requirements.

On which vehicles can API CI-4 diesel engine oil be used?

Designed for appropriate heavy-duty diesel engines used in commercial trucks, buses, and fleets requiring API CI-4 performance. Always check the required specification in the equipment or engine owner's manual before application.

Do you offer bulk supply and distributor supply services?

Yes. Ningbo MOS Chemical Co., Ltd. supports wholesale purchases, bulk supply, and export cooperation for lubricant distributors, importers, fleet maintenance companies, and buyers in the automotive parts market.

Is OEM or private label packaging available?

OEM and private label cooperation can be arranged depending on order volume, packaging format, label design, and target market requirements. Buyers may contact the B2B sales department for detailed project information.