Hypoid Gear Oil MP GL-5 85w140 1Qt

Hypoid Gear Oil MP GL-5 85W140 1Qt is a premium synthetic lubricant engineered for the extreme pressures and shear forces found in modern differential assemblies, limited-slip units, and heavy-duty manual transmissions. This product exists because hypoid gears—the spiral-cut differentials in your rear axle—operate under boundary lubrication conditions where gear teeth mesh at angles that generate tremendous heat and contact stress. Whether you're building a track car, maintaining a lifted truck with aggressive gearing, or servicing a performance shop rebuild, this 1 Qt bottle delivers the anti-wear protection and extreme-pressure (EP) additives your drivetrain demands.

The GL-5 specification rating confirms this oil meets American Petroleum Institute standards for severe hypoid duty, with robust anti-scuff chemistry that prevents gear tooth micro-welding under shock loads—critical when launching hard or towing heavy loads. The 85W140 viscosity grade delivers 85-weight cold-flow characteristics for easier winter shifting while maintaining a robust 140-weight film strength at operating temperature (typically 200°F in the differential). AMALIE's formulation resists oxidation and thermal breakdown, preventing sludge accumulation and extending differential fluid change intervals, while enhanced anti-wear additives minimize bearing wear in extended-slip or locking differentials that generate sustained friction.

This product is ideal for owners upgrading to numerically aggressive ring-and-pinion ratios (3.73 or steeper), installing performance differentials, or maintaining vehicles already running high-horsepower builds. The 1 Qt size suits single-fill top-ups or maintenance between full fluid services; most passenger differentials require 2–3 quarts, while truck applications often need 4–6 quarts total. Always consult your vehicle's service manual or differential manufacturer for capacity and drain-fill procedures; some late-model OEM differentials specify synthetic ATF or proprietary fluids instead. This AMALIE hypoid gear oil is not compatible with limited-slip units designed exclusively for friction-modifier additives—verify your differential type before purchase.