Transmission Oil MOBIL 143914 - Premium Gear Protection

Purpose and Specifications

MOBIL 143914 is a premium transmission oil designed for manual gearboxes and differentials in cars, trucks, and commercial vehicles. This 85W-90 grade oil provides reliable lubrication across a wide temperature range, protecting gears and bearings from wear, rust, and corrosion.

• Viscosity Grade: 85W-90 - flows smoothly in cold weather (down to -40°C) while maintaining protective thickness at high operating temperatures (up to 100°C)
• API GL-5 Specification: Meets the highest performance standard for manual transmissions, offering superior anti-wear and extreme pressure protection
• Capacity: 20 liters per container
• Approved for: Multiple transmission types including Allison, ZF, and other major manufacturers (TE-ML 07A, TE-ML 16C, TE-ML 17B, TE-ML 19B, TE-ML 21A)

When to Use / Replace?

Replace transmission oil every 40,000 to 80,000 kilometers or every 2-3 years, depending on your vehicle manufacturer's recommendations and driving conditions. Use this oil in manual transmissions, transfer cases, and differentials that require GL-5 specification. Ideal for vehicles operating in extreme temperatures or under heavy-duty conditions.

Key Benefits

• Reduces gear noise and vibration for quieter operation
• Protects against metal-to-metal contact and extends transmission life
• Resists breakdown under high pressure and temperature stress
• Compatible with standard seal materials - no leakage concerns
• Premium formulation ensures long service intervals

Frequently Asked Questions

Q: Can I use this oil in my automatic transmission?
A: No. MOBIL 143914 is formulated for manual transmissions and differentials only. Automatic transmissions require ATF (Automatic Transmission Fluid) with different friction properties.

Q: What does 85W-90 mean?
A: The 85W rating means the oil flows easily when cold (winter conditions), while 90 indicates it maintains proper thickness at high operating temperatures. This dual rating ensures year-round protection.

Q: How long does this oil last once opened?
A: Unopened containers remain stable for several years when stored in cool, dry conditions. Once opened, use within the same season to prevent moisture absorption and oxidation.