Liqui Moly Gear Oil GL4 SAE 85W-90 — 1 L synthetic-blend for manual transmissions with wear and corrosion protection

Liqui Moly Gear Oil GL4 SAE 85W-90 is a 1-liter synthetic-design gear and hydraulic oil formulated for manual gearboxes and axle drives that require an API GL-4 fluid.

This single-liter bottle from Liqui Moly offers a synthetic blend in the SAE 85W-90 viscosity grade, engineered to form a stable lubricating film for transmissions and axle units with normal to heavy loading. Designed for vehicles and equipment specifying API GL-4, it mixes with branded gear oils but performs best when used alone. The formulation prioritizes wear reduction, excellent lubrication properties and strong corrosion protection to keep gears operating smoothly under everyday and demanding conditions.

What types of gearboxes and drives can this oil be used in?

Use this GL-4 oil in manual transmissions, axle drives and other gear systems where the manufacturer calls for API GL-4 performance. It is intended for conventional transmission technology rather than specialized high-pressure or newer specification applications.

• Manual transmissions with synchronizers that accept GL-4 fluids
• Axle drives experiencing normal to high load
• Older or classic vehicles requiring mineral-compatible oils
• Not recommended for applications requiring GL-5 or other specific additives

How does it protect gears and bearings during operation?

The oil builds a consistent lubricating film across gear teeth and bearings, which reduces metal-to-metal contact and slows wear. It also contains corrosion inhibitors to defend components from rust and deposits that can reduce service life.

• Stable film formation for sustained lubrication under pressure
• Wear-minimizing additives to extend component life
• Corrosion protection to prevent pitting and surface degradation
• Maintains performance across typical operating temperatures

Is this product compatible with other gear oils and how should it be selected?

Liqui Moly GL4 SAE 85W-90 is miscible with other branded gear oils, which can simplify topping up, but optimal performance is achieved when it is used by itself. Always follow the gearbox or vehicle maker's recommended viscosity class and API rating when choosing a gear oil to ensure proper protection and shifting behavior.

• Mixes with most commercial gear oils if needed for topping up
• Best results when used as the sole oil in the system
• Confirm manufacturer-specified viscosity and API GL rating before use
• Not a substitute for oils requiring GL-5 or specialized friction modifiers

How should I store and handle this 1 L bottle to keep oil quality?

Keep the sealed 1-liter container in a cool, dry place away from direct sunlight and extreme temperatures to preserve additives and base oil quality. Use clean funnels and tools when pouring to avoid contamination, and reseal the cap after each use.

• Store upright in a temperature-stable, dry environment
• Avoid contamination—use clean transfer tools and funnels
• Reseal tightly after pouring to protect additives from air and moisture
• Dispose of empty containers per local regulations

Who is this for: Liqui Moly Gear Oil GL4 SAE 85W-90 is aimed at DIY mechanics, professional workshops and vehicle owners with manual transmissions or axle drives that specify API GL-4 and an SAE 85W-90 viscosity. It suits older and conventional transmissions where a dependable, wear-reducing oil with corrosion protection is required, and for anyone who prefers a high-quality branded product in a convenient 1-liter size for maintenance tasks and top-ups.