AMSOIL 75W90 Synthetic Gear Oil for Long-Life Protection

Description

AMSOIL 75W90 Gear Oil is engineered to provide extended drain intervals reaching up to 500,000 miles in over-the-road trucks, where allowed by equipment manufacturers. This synthetic gear lube combines premium synthetic base oils and high-performance additives to resist acid, carbon, and varnish buildup from oxidative breakdown, keeping gears cleaner and components lasting longer.

Its formula is shear-stable and designed to maintain viscosity throughout extended use, offering excellent wear protection while also improving fuel efficiency. Cold-temperature fluidity paired with high-temperature stability makes this gear oil reliable throughout all seasons.

Suitable for a wide range of applications, AMSOIL Long Life Synthetic Gear Lube in 75W90 viscosity works in domestic and foreign vehicles including trucks, SUVs, commercial equipment, motor homes, buses, and tractors. It meets or exceeds many industry standards such as API GL-5 & MT-1, MIL-PRF-2105E, and specifications for Dana, Mack, Meritor, and other manufacturers, as well as being compatible with rear axles that require API GL-4 lubricants.

Consult the owner’s manual or OEM guidelines to determine normal or severe service intervals. Drains can range from 50,000 to 500,000 miles depending on application and severity of use. Note that water contamination requires more frequent oil changes, and dusty or dirty environments call for more regular servicing unless properly protected.

AMSOIL’s Long Life Synthetic Gear Oil is compatible with conventional gear oils, though mixing reduces the benefits and voids extended drain recommendations. It works well with most limited-slip differentials; adding AMSOIL Slip-Lock friction modifier can help if chatter occurs.

This gear oil replaces competitor 75W-90 and 80W-90 grades and offers broad industry approval, backed by AMSOIL’s Limited Liability Warranty. Health and safety guidelines should be followed as outlined in the product’s Safety Data Sheet.

• High load capacity for enhanced gear and bearing protection
• Resistance to rust and corrosion to extend component life
• Improved shifting performance in cold temperatures
• Enhanced fuel efficiency through friction reduction
• Extended seal life to help minimize leaks and maintenance