Motul Gear 300 LS 75W-90 Transmission and Differential Fluid Full Synthetic Ester Gear Oil - 1L

Motul Gear 300 LS 75W-90 is a high-performance 100% synthetic ester-based gear oil engineered for manual transmissions, limited slip differentials, and drivetrain components operating under extreme load and high-performance conditions. It is specifically positioned by Motul for high-performance and racing applications, including gearboxes and hypoid differentials with limited slip systems.

Designed for smooth shifting, reduced friction, and maximum protection, Gear 300 LS delivers consistent performance under high torque, aggressive driving, and motorsport environments. It also contains a special friction modifier to help prevent noisy or dragging limited slip differentials.

Built using Motul’s ester extreme-pressure technology, this fluid provides excellent film strength, thermal stability, and wear protection for both street and track applications.

Performance tier

Top tier – street / track

Developed for performance driving, aggressive street use, and motorsport applications where drivetrain protection, limited slip differential performance, and shift consistency are critical.

Variants

1L – single bottle
Standard size for transmission and differential service 

Features

100% synthetic ester-based gear oil
75W-90 viscosity for balanced performance
Special friction modifier for limited slip differentials
Smooth and consistent shifting performance
High film strength for gear protection under load
Excellent resistance to heat and shear breakdown
Reduces wear and extends drivetrain life 

Fitment

Subaru WRX 1993-2026
Subaru STI 1994-2021
Manual transmissions and limited slip differentials

Compatible with synchronized and non-synchronized gearboxes, gearbox/differential, transfer gearboxes, and hypoid differentials with limited slip systems that require 75W-90 API GL-5 gear oil.

Specifications

Type: 100% synthetic ester-based gear oil
Viscosity: 75W-90
API rating: GL-5
Available size: 1 liter
Density at 20°C: 0.904
Viscosity at 40°C: 109.6 mm²/s
Viscosity at 100°C: 16.4 mm²/s
Viscosity index: 161
Pour point: -42°C / -43.6°F
Flash point: 200°C / 392°F
Brand: Motul

How much do you need

Most subaru manual transmissions require approximately 3.5–4 liters

Rear differential typically requires approximately 0.8–1 liter

Recommended purchase: 5 liters for complete transmission and differential service

Note

Not recommended for automatic transmissions

Always verify fluid requirements based on specific vehicle setup and whether the application uses a limited slip differential.

Recommended pairings

Motul 300V engine oil
Motul rbf 600 or rbf 660 brake fluid
Motul motocool coolant