National Gear Oil EP 90 GL 4 (205L)

Gear Oil (Monograde)

Features & Benefits

• Excellent protection against gear wear, rust, and corrosion
• Moderate EP additive system prevents scoring and pitting in synchronized transmissions
• Stable viscosity for consistent lubrication under varying temperature conditions
• Meets API GL 4 standards—ideal for gear systems not requiring GL 5 level EP protection
• Optimized for smoother gear operation and extended component life

Applications

• Suitable for manual transmissions, light-duty axles, and spiral bevel gears requiring GL 4 performance
• Ideal for use in synchronized manual gearboxes and older gear units
• Recommended for vehicles where excessive EP additives may damage soft metals like bronze or brass

Properties & Specifications

• Viscosity Grade: EP 90
• API Classification: GL 4
• SAE Grade: SAE 90
• ISO Compliance: ISO 6743/6 CKC
• Base Oil Type: Mineral oil with medium EP additive concentration
• OEM Approvals: Compatible with transmission specs from light and medium vehicle OEMs