Diesel Engine Oils API CF-4 20W40

About Diesel Engine Oils API CF-4 20W40

API CF-4 20W40 is a high-performance multigrade diesel engine oil specially formulated for heavy-duty diesel engines operating under tough working conditions such as high temperatures, heavy loads, dusty environments, and long driving hours. It provides excellent lubrication, wear protection, soot control, and engine cleanliness for both turbocharged and naturally aspirated diesel engines. The 20W40 viscosity ensures smooth cold starting and strong oil film protection at high operating temperatures, making it suitable for commercial vehicles, tractors, construction equipment, generators, and agricultural machinery.

Applications

• Heavy-duty trucks and buses
• Commercial transport vehicles
• Agricultural tractors and farming equipment
• Construction and mining machinery
• Diesel generator sets
• Turbocharged and naturally aspirated diesel engines
• Off-highway equipment and industrial diesel engines
• Marine diesel engines and fishing boats

API CF-4 oils are commonly recommended for older generation diesel engines operating under severe service conditions.

Key Specifications

These specifications help provide excellent thermal stability, soot handling capability, and long engine protection.

Features & Benefits

Excellent Wear Protection

Provides strong oil film strength that reduces friction and protects engine components such as pistons, rings, liners, and bearings from wear during heavy-duty operation.

Superior Engine Cleanliness

Advanced detergent and dispersant additives minimize sludge, varnish, and carbon deposits, keeping the engine cleaner for longer service life.

High Temperature Stability

Offers excellent oxidation resistance and thermal stability, preventing oil thickening and maintaining performance under high operating temperatures.

Better Soot Control

Controls soot buildup effectively in diesel engines, helping maintain viscosity and reducing piston deposits and ring sticking.

Longer Drain Intervals

Enhanced additive technology supports extended oil drain periods, reducing maintenance frequency and operating costs.

Corrosion & Rust Protection

Protects internal engine parts against rust, corrosion, and acid formation caused by combustion by-products and fuel contaminants.

Smooth Engine Performance

Ensures reliable lubrication in varying climatic conditions, promoting smoother engine operation and improved engine efficiency.