National Gear Oil EP 140 GL 4 (205L)

Gear Oil (Monograde)

Features & Benefits

• High-viscosity lubricant for heavy-duty applications requiring thick oil films
• Moderate EP protection suitable for gearboxes and axles with non-hypoid gear systems
• Prevents rust, oxidation, and foaming in gear housings
• Compliant with API GL 4 for balanced protection and performance
• Maintains lubrication integrity in high-load, high-heat conditions

Applications

• Best for non-synchronized gearboxes, industrial gear drives, and moderate-duty axles
• Recommended for older transmission systems in agricultural or off-road equipment
• Suitable where GL 4 oils are specified but higher viscosity is needed

Properties & Specifications

• Viscosity Grade: EP 140
• API Classification: GL 4
• SAE Grade: SAE 140
• ISO Compliance: ISO 6743/6 CKC
• Base Oil Type: Mineral oil with medium EP additive package
• OEM Approvals: Designed for compatibility with a wide range of mechanical gear systems