Heavy-Duty Diesel Engine Oil

SAE 15W40 API CI-4
Advanced Protection Formula

High-performance diesel engine oil engineered for heavy-duty operation to deliver wear control, soot handling, and dependable protection in high-load and high-temperature service.

API CI-4 Specification

3.46L / 0.946L Pack Sizes

100% Virgin Base Oil

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DELUXE SAE 15W40 API CI-4

SAE 15W40 | API CI-4 | FULL SYNTHETIC

DELUXE SAE 15W40 API CI-4 is a high-performance diesel engine oil formulated with premium virgin base oils and advanced additive technology. It helps control soot and deposits, protect against wear, and maintain viscosity stability under heavy-load, high-temperature, and extended-duty operation.

Product Type

Heavy-Duty Diesel Engine Oil

Performance Level

SAE 15W40 / API CI-4

Package Sizes

3.46 Litres, 1 US QT (0.946 Litres)

Engine Compatibility

Diesel Engines and Mixed Fleets

Soot Control Oxidation Stability Deposit Control Wear Protection High-Load Durability

Key Benefits

Why Choose SAE 15W40 API CI-4

Advanced heavy-duty formula engineered for diesel engine cleanliness, durability, and reliable operation in demanding duty cycles.

Soot Handling

Advanced dispersants help suspend soot particles and reduce sludge formation for cleaner diesel engine internals.

Fast Cold-Start Flow

Reliable cold-flow properties support startup protection and quicker lubrication delivery in cooler conditions.

Thermal Stability

Resists viscosity breakdown and oxidation under high operating temperatures for consistent heavy-duty engine protection.

Outstanding Wear Control

Helps protect liners, bearings, cams, and valve-train components from wear under high-load and long-haul operation.

Deposit & Sludge Control

Strong detergent package helps minimize piston deposits and ring sticking to support performance and service life.

High-Load Durability

SAE 15W40 viscosity provides strong oil-film strength for sustained protection in heavy-duty and high-temperature service.

Technical Data

Performance Specifications

Typical technical characteristics for DELUXE SAE 15W40 API CI-4 Full Performance diesel engine oil.

Product Type	Heavy-Duty Diesel Engine Oil
Specification	SAE 15W40 / API CI-4
Appearance	Amber Liquid
Kinematic Viscosity @ 40°C	110 cSt
Kinematic Viscosity @ 100°C	15.0 cSt
Viscosity Index	145
Flash Point (COC)	236°C (457°F)
Pour Point	-27°C (-17°F)
Density @ 15°C	0.872 g/cm3
TBN	10.0 mgKOH/g
Oxidation Stability	Excellent
Primary Packaging	3.46 Litres, 1 US QT (0.946 Litres)

Heavy-Duty Diesel Vehicles

Heavy-duty diesel trucks and buses
Vehicles requiring SAE 15W40 / API CI-4 engine oil
Long-haul and high-mileage operation
Turbocharged diesel engines

Off-Highway Equipment

Construction and agricultural machinery
High-load industrial diesel engines
Reliable protection against soot and deposits
Consistent operation in dusty and hot environments

Severe Service Conditions

High ambient temperatures
Stop-and-go urban operation
Extended high-speed operation
Heavy traffic with repeated thermal cycles