Purpose and Specifications

Motul Gear 300 75W90 is a high-performance synthetic transmission oil engineered for manual gearboxes, differentials, and transfer boxes in racing and high-demand vehicles. This 100% synthetic ester-based lubricant meets API GL-4 and GL-5 standards, making it suitable for both synchronized and non-synchronized transmissions operating under extreme pressure and heavy loads.

Key Performance Benefits:

• Reduces friction and wear in gears, synchros, and bearings for smoother, more accurate shifting
• Maintains protective oil film at high temperatures (up to 90°C+) to prevent gear noise and metal-to-metal contact
• Flows easily at cold temperatures for comfortable gear engagement in winter conditions
• Zero shear loss—the oil stays thick and protective even under extreme racing conditions, unlike conventional oils that thin out over time
• Anti-corrosion and anti-foam properties protect internal transmission components from rust and oxidation

Operating Temperature Range: -30°C to +90°C. Density: 0.897 g/cm³ at 20°C.

When to Use / Replace?

Replace transmission fluid according to your vehicle manufacturer's maintenance schedule. For racing and high-performance use, consider more frequent changes—typically every 10,000–15,000 km or annually, whichever comes first. For street vehicles under normal conditions, follow the owner's manual (often 40,000–80,000 km intervals). This oil is ideal for:

• Race cars, rally vehicles, and track-day cars
• High-performance manual transmissions (R154, Tremec, Getrag, etc.)
• Subaru WRX, STI, BRZ, and Toyota GR86 differentials
• Any transmission experiencing heavy loads, frequent gear changes, or extreme temperatures

Shelf Life: Store in a cool, dry place. Unopened containers remain stable for 3–5 years.

Frequently Asked Questions

Q: Will this oil make my shifts smoother?
A: Yes. Users report noticeably smoother and faster gear changes because the synthetic formula reduces friction between gears and synchros. Less effort is required on the gear lever, especially when the transmission is cold.

Q: Can I use this in a limited-slip differential?
A: No. Motul Gear 300 is designed for open differentials and standard hypoid gears without limited-slip systems. Check your vehicle's specifications before use.

Q: Is this oil compatible with my transmission seals?
A: Yes. This oil is suitable for all standard seal materials and yellow metals used in modern gearbox design, including rubber and synthetic seals.