Motul Gear 300 LS 75W90 Racing Gear Oil 1L — Ester Core Synthetic for Limited-Slip Differentials & Manual Transmissions

Motul Gear 300 LS 75W90 is a 100% synthetic Ester Core racing gear oil formulated to protect and optimize limited slip differentials, manual gearboxes, and performance drivetrains under high load and heat.

Built for motorsport and high-output street applications, this lubricant combines Motul’s Ester Core technology with a tailored limited-slip friction profile to deliver consistent engagement, strong film strength, and resistance to thermal degradation. It is suitable for synchronized and non-synchronized gearboxes, hypoid differentials including clutch-type or plated limited slip systems, and transfer cases that experience shock loading, aggressive launches, or prolonged high-speed operation.

How does this oil benefit limited slip differentials during spirited driving?

The Gear 300 LS formula provides controlled friction characteristics to promote predictable limited slip operation while minimizing chatter and vibration often felt during sudden torque transfer. Its additives balance grip and slip so clutch-type LSDs engage smoothly, preserving traction and driver control.

• Clutch-friendly friction modifiers for reduced chatter
• Consistent engagement under varying torque loads
• Improved traction response on acceleration and corner exits

Will it protect gears and bearings under extreme temperatures and heavy loads?

Yes — Motul’s Ester Core synthetic base builds a robust lubricating film that resists shear and thermal breakdown, helping gears and bearings endure high-stress track conditions and towing. The oil’s extreme-pressure additives and oxidation inhibitors extend component life and maintain viscosity stability when temperatures climb.

• High film strength to prevent metal-to-metal contact
• Oxidation and thermal stabilizers for extended protection
• Resistance to foaming and oil breakdown during sustained heat

Is Gear 300 LS suitable for manual transmissions as well as differentials?

This 75W90 grade is formulated to lubricate synchronized and non-synchronized manual gearboxes, supporting smooth shifting and reliable synchro performance. The low internal friction properties help maintain shift quality across a wide temperature range for both daily-driven and race-prepped vehicles.

• Smooth shifting for synchronized transmissions
• Reduced internal drag to support drivetrain efficiency
• Compatible with many manual gear and transfer case applications (check OEM specs)

How does Motul Gear 300 LS compare to conventional gear oils?

Compared with mineral or standard synthetic gear oils, the Ester Core formulation offers superior film strength, quicker thermal recovery, and longer-lasting protection under extreme conditions. It’s engineered for performance-focused drivetrains where consistent friction management and anti-wear performance are critical.

• Enhanced wear protection versus typical mineral oils
• Superior high-temperature stability and longevity
• Optimized for clutch-type and plated LSD systems

Who is this for? Motul Gear 300 LS 75W90 is aimed at owners and builders of performance cars, track-day machines, rally and circuit competitors, and anyone running clutch-type or plated limited slip differentials who needs a high-performance synthetic gear oil. It also suits enthusiasts who demand smooth manual transmission shifts and robust protection during hard acceleration, towing, or sustained high-speed driving. Always verify compatibility with your vehicle manufacturer’s recommendations before changing fluids.