10 Best Synthetic Differential Gear Oil of December 2025

• Exceptional thermal stability and resistance to high temperature oxidation Extended gear and bearing life due to minimal deposits. Promotes Longer seal life and Potentially extended oil drain or service intervals
• Outstanding protection against low speed or high torque wear and against high speed scoring with capability to handle the severest driving conditions while delivering smooth efficient and reliable performance
• Exceptional shear stability. Retains viscosity and film strength under severe operating conditions to prevent wear
• Excellent rust, staining and corrosion protection of copper and its alloys. Reduced wear with Longer component life
• Excellent limited-slip performance. Reduced chatter and improved traction

Mobil 1

• Case of 2 // 1 Quart (32 Ounces)
• Max Gear makes gears run smoother, quieter, cooler and longer without overhauls. A direct reduction of drag in the drive train has huge advantage for trucks and other 4-wheel drive vehicles: better gas mileage. Max Gear is formulated with a friction modifier additive – no additional additives are necessary.
• Royal Purple engineered this ultra-tough, high performance automotive hypoid gear oil to provide maximum protection to heavily loaded gears while maximizing power throughout the drive train.
• Max Gear outperforms ordinary gear oils by combining the highest quality synthetic oils with Royal Purple’s proprietary Synerlec additive technology.
• Maximizes horsepower, Extends gear and bearing life, Reduces operating temperature, Severe service performance, Lower coefficient of friction, Superior corrosion protection

Royal Purple

• Super-slick long lasting lubricant
• Safely blends with other gear oils, petroleum, or synthetic
• Insures less gear noise and longer bearing life
• Stands up to high temperatures while maintaining lubricity
• Specifically designed for heavy duty and high performance applications

Lucas Oil

• For best performance, follow the manufacturer's recommendations in your vehicle owner’s manual.

Royal Purple

• Made in United States
• Package height :8.89 cm
• Package length :28.956 cm
• Package width :8.89 cm

Mobil 1

• Stands up to high temperatures without losing its lubricity
• Excellent for use in limited-slip differentials
• Safely blends with other gear oils, petroleum or synthetic
• Specially designed for heavy duty and high performance applications

Lucas Oil

• Protects against severe temperatures to help extend service life
• Formulated with extreme-pressure additives to minimize gear wear from shock loads
• Helps protect against gear wear from scuffing, scouring, corrosion and pitting
• Recommended for conventional hypoid differentials and non-synchronized manual transmissions in passenger cars, light trucks, sport utility vehicles, vans and heavy-duty trucks where an API-GL5 or GL-4 fluid is specified

Valvoline

• Fit Type: Vehicle Specific
• Package Dimensions: 31.75 H x 15.24 L x 15.24 W (centimeters)
• Country of Origin : United States
• Package Weight: 3.447 kilograms

Lucas Oil

• Formulated to maintain excellent low temperature fluid protection
• Helps provide outstanding thermal stability for cleanliness and longer service life
• Contains special additives to assist in protecting gear teeth from rust and corrosion and reduce chattering in limited-slip differentials
• Recommended for conventional and limited slip differentials and non-synchronized manual transmissions where API GL-5 or API GL-4 fluid is specificed

Valvoline

• United States

Mobil