Filters
AMSOIL Synthetic Gear Oil
Shop AMSOIL Gear Oil for advanced synthetic protection in cars, trucks, commercial vehicles, motorcycles, marine equipment, ATVs, snowmobiles and other demanding applications. AMSOIL synthetic gear lubricants are engineered to help protect gears and bearings against wear while delivering dependable performance under heavy loads, high temperatures and severe operating conditions.
Choose from popular gear oil viscosities, including 75W-85, 75W-90, 75W-110, 75W-140, 80W-90 and SAE 250. Whether you need gear oil for a differential, manual transmission, marine lower unit or heavy-duty drivetrain, AMSOIL offers specialized formulations designed for a wide range of equipment and operating requirements.
AMSOIL also offers application-specific lubricants for V-Twin motorcycle primary systems, ATV and snowmobile chaincases, marine applications and severe-duty differentials. From daily driving and towing to hauling, off-road use and commercial service, you can find an AMSOIL lubricant formulated for your application.
Shop AMSOIL synthetic gear oil below and select the viscosity and formulation recommended for your vehicle or equipment.
Shop Now
AMSOIL SEVERE GEAR® 75W-85 100% Synthetic Gear Lube
AMSOIL 75W-90 SEVERE GEAR® 100% Synthetic Gear Lube
AMSOIL SEVERE GEAR® 75W-110 100% Synthetic Gear Lube
AMSOIL SEVERE GEAR® 75W-140 100% Synthetic Gear Lube
AMSOIL SEVERE GEAR® 80W-90 Synthetic EP Gear Lube
AMSOIL SEVERE GEAR® SAE 250 100% Synthetic Gear Lube
AMSOIL 75W-90 Long Life 100% Synthetic Gear Lube
AMSOIL 80W-140 Long Life 100% Synthetic Gear Lube
AMSOIL Slip Lock® Differential Additive
AMSOIL 100% Synthetic V-Twin Primary Fluid
AMSOIL 100% Synthetic Chaincase & Gear Oil
AMSOIL 75W-90 100% Synthetic Marine Gear Lube
Synthetic Gear Oil Protection for Demanding Applications
AMSOIL synthetic gear lubricants are engineered to protect gears, bearings and other drivetrain components operating under demanding conditions. Heavy loads, high temperatures, towing, hauling and extended operation can place significant stress on gear lubricants. High-quality synthetic formulations help maintain a durable lubricating film while protecting critical components against wear.
AMSOIL offers gear lubricants for passenger vehicles, pickups, SUVs, commercial vehicles, heavy equipment, marine applications and powersports equipment. With multiple viscosity grades and application-specific formulations available, you can choose the lubricant that meets the requirements of your vehicle or equipment.
Benefits of AMSOIL Synthetic Gear Lubricants
Depending on the specific product and application, AMSOIL synthetic gear lubricants are designed to provide benefits such as:
Choosing the Right Gear Oil Viscosity
Selecting the correct viscosity is important for proper drivetrain protection and performance. Always check your owner's manual or manufacturer specifications before selecting a lubricant.
75W-85 Gear Oil – A lower-viscosity synthetic gear lubricant for vehicles and equipment that specify SAE 75W-85.
75W-90 Gear Oil – A widely used viscosity for differentials and other automotive drivetrain applications. Specialized 75W-90 formulations are also available for manual transmissions and marine equipment.
75W-110 Gear Oil – Provides a higher operating-temperature viscosity than 75W-90 for applications requiring SAE 75W-110.
75W-140 Gear Oil – Commonly specified for some heavy-duty and severe-service applications. It can be appropriate for vehicles exposed to towing, hauling and other demanding conditions when 75W-140 is specified.
80W-90 Gear Oil – Provides synthetic protection for vehicles and equipment requiring the traditional SAE 80W-90 viscosity grade.
SAE 250 Gear Oil – A high-viscosity option for specialized applications requiring an SAE 250 gear lubricant.
Gear Lubricants for Automotive, Marine and Powersports Equipment
AMSOIL offers more than traditional automotive differential lubricants. Application-specific products are available for a variety of vehicles and equipment, including:
Because lubricant requirements vary, choose the viscosity and product specification recommended for your particular application rather than selecting a gear oil based on viscosity alone.
Frequently Asked Questions About AMSOIL Gear Oil
What AMSOIL gear oil should I use?
The correct product depends on your vehicle or equipment, component, required viscosity and manufacturer specifications. Check your owner's manual or use an application lookup guide to verify the correct lubricant before purchasing.
What is the difference between 75W-90 and 75W-140 gear oil?
Both are multigrade gear lubricants, but 75W-140 maintains a higher viscosity at operating temperature. That does not mean 75W-140 is automatically better. Use the viscosity recommended for your particular differential or drivetrain component.
Is synthetic gear oil good for towing and hauling?
Synthetic gear lubricants can provide excellent protection under the high temperatures and heavy loads associated with towing and hauling. AMSOIL offers severe-service formulations designed for demanding drivetrain applications. Always select the viscosity and specification required by the vehicle manufacturer.
Does AMSOIL make gear oil for limited-slip differentials?
AMSOIL offers gear lubricants suitable for many limited-slip differential applications. Requirements can vary by differential, so verify the correct lubricant and whether additional limited-slip additive is required for your specific application.
Can AMSOIL gear oil be used in a manual transmission?
Only when the particular AMSOIL lubricant meets the specifications required by the transmission manufacturer. Manual transmissions can have different friction and lubricant requirements than differentials, so do not select a product based only on viscosity.
Does AMSOIL make marine gear oil?
Yes. AMSOIL offers synthetic marine gear lubricant formulated for marine lower-unit applications. Use the product appropriate for your boat's lower unit and manufacturer specifications.
Does AMSOIL make gear lubricants for motorcycles, ATVs and snowmobiles?
Yes. AMSOIL offers specialized powersports lubricants, including products for V-Twin motorcycle primary systems and ATV and snowmobile chaincases. Check the equipment manufacturer's requirements to select the appropriate product.
How do I know which gear oil viscosity I need?
Check the owner's manual or manufacturer specifications for the required SAE viscosity and performance specification. Factors such as vehicle model, differential type and application can affect the lubricant requirement. When in doubt, verify the application before ordering.