Motul Gear 300 75W-90 Set of 5 - Smooth, High-Temp Gear Oil

In this review of Motul Gear 300 75W-90 transmission fluid, the bottom line is simple: this is a 100 percent synthetic, ester-based hypoid oil best suited for separate gearboxes without a wet clutch where high temperature stability and smooth shifting matter most. It stands out for its virtually unshearable oil film that preserves protection under extreme conditions and for reducing transmission noise and shift effort. For owners who need consistent high-temperature protection and buttery shift feel, this set of five 1-liter bottles is a practical choice.

Key Features

• 100 Percent Synthetic Ester based: provides long-term thermal stability to protect gear surfaces under sustained high loads and heat.
• Extreme pressure formulation: delivers anti-wear protection to key gearbox components, extending gear life in demanding conditions.
• Virtually unshearable oil film: resists shear loss so viscosity and film strength remain consistent even after heavy use.
• 90 grade at hot temperature: maintains outstanding oil film resistance to reduce transmission noise and maintain smooth operation when hot.
• Improved shift quality: reduces effort on the gear lever for faster, smoother gear changes as reported by users.

Who It's For

Motul Gear 300 is aimed at drivers and mechanics who maintain separate gearboxes without a wet clutch, including many performance and late-model street vehicles where heat and load make durability essential. It is especially useful for owners of multi-speed transmissions who want a fluid that keeps shift feel consistent and minimizes noise at operating temperature.

Those who need a product specifically for gearboxes with integrated wet clutches or who require manufacturer-mandated specialized fluids should check compatibility before buying. This product is not intended for systems that require oils formulated for wet clutch lubrication.

Pros & Cons

Pros

• High temperature stability preserves protection and viscosity under severe conditions.
• Customers report noticeably smoother shifts and reduced transmission noise.
• Consistent, butter-like fluid quality makes it easy to pour and use during service.
• Sold as a set of five 1-liter bottles, offering good value for multiple services.

Cons

• Not formulated for gearboxes with wet clutches, so it is unsuitable where a wet-clutch fluid is required.
• Contains chemicals noted by California warnings, so users should handle and store it carefully.

Specifications

Product type	Hypoid synthetic gear oil for separate gearboxes
Viscosity grade	75W-90 (90 grade at hot temperature)
Base chemistry	100 percent synthetic ester based
Quantity	Set of 5 x 1 liter bottles
Key performance	Extreme pressure, unshearable oil film
Typical benefit	Reduces shift effort and transmission noise
Application note	For separate gearboxes without a wet clutch

Our Verdict

Motul Gear 300 75W-90 is a strong choice for technicians and enthusiasts who need a robust, high-temperature stable gear oil for separate gearboxes. Its ester-based, unshearable formulation keeps shifts smooth and reduces noise, and the five 1-liter set is good value for repeated servicing. Buyers should confirm gearbox compatibility where a wet-clutch fluid is required, but for its target use this fluid delivers reliable protection and excellent shift quality.

Frequently Asked Questions

Is this oil suitable for wet clutch gearboxes?
Answer. No, this product is formulated for separate gearboxes without a wet clutch and is not intended for systems that require wet-clutch lubrication.

Will this improve shifting on high-mileage transmissions?
Answer. Many users report smoother shifting and reduced effort, so it can improve feel on transmissions where viscosity and film strength have degraded.

How much oil is included in the pack?
Answer. The pack contains five 1-liter bottles, sufficient for multiple services or several axles depending on the vehicle.