Royal Purple Max Gear 75W-90 is a premium full-synthetic high-performance gear oil engineered to deliver exceptional protection and efficiency for manual transmissions, differentials and final drive units. Formulated with Royal Purple’s advanced Synerlec® additive technology, Max Gear reduces friction, improves drivetrain smoothness and helps extend component life under both road and motorsport conditions.

This 75W-90 gear oil provides outstanding film strength to minimise metal-to-metal contact, improving durability for gears, bearings and synchros – even under high load, heat and shock-load conditions often seen in performance and track-driven vehicles.

Suitable for cars, 4x4s, performance builds and light commercial vehicles, Max Gear 75W-90 enhances fuel efficiency, reduces operating temperatures, and can help quieten gear whine. It is also compatible with limited slip differentials, eliminating the need for separate friction modifiers in most cases.

🔎 Why Choose Royal Purple Max Gear 75W-90 in the UK?

• Outstanding protection for road, performance and motorsport use

• Helps reduce drivetrain noise, vibration and harshness

• Improves shift feel on manual transmissions

• Excellent for performance, fast-road and track day vehicles

• Works with petrol and diesel applications

✅ Key Features & Benefits

• High-Performance Synthetic Gear Oil – Ideal for daily road, fast road and motorsport.

• Synerlec® Technology – Exceptional wear protection and long service life.

• Reduces Friction & Heat – Improves efficiency and drivetrain longevity.

• Smooths Gear Shifts – Helps reduce gear clash and improve synchro performance.

• Limited-Slip Compatible – No extra friction modifier needed for most LSD units.

• Resists Thermal Breakdown – Maintains viscosity under high load and temperature.

🔧 Recommended For

• Manual transmissions & transaxles

• Differentials (including LSD)

• Performance, fast-road and track cars

• 4x4s and light commercial vehicles

Note: Always check manufacturer specifications to confirm compatibility with your vehicle.

🛠️ Specifications

• Viscosity: 75W-90

• Oil Type: Full Synthetic Gear Oil

• Size: 1 Quart (946ml)

• Suitable For: Manual gearboxes, final drives & limited-slip differentials

• Series: Royal Purple Max Gear

📦 What You Receive

• 1 × Royal Purple Max Gear 75W-90 – 1 QT Bottle