TRIAX Gear Premium LS 80W-90 Gear Oil - Wide Spec Coverage

In this review the TRIAX Gear Premium LS 80W-90 is presented as a heavy-duty gear oil aimed at technicians and fleet managers who need one fluid that covers many vehicle makes. The bottom line: this is a practical choice when compatibility and long-term protection matter most, because it delivers a remarkably wide OEM specification range and a built-in limited slip formulation so separate additives are not required. For shops that service mixed fleets, that single-POV compatibility is the clearest reason to consider it.

Key Features

• Widest specification range: Compatible with a large number of hypoid gear systems, differentials and transmissions from manufacturers such as VOLVO, Mack, MAN, ZF and EATON, reducing the need to stock multiple oils.
• Severe service formulation: The polyphosphate EP proprietary additive system improves shear stability and oxidation resistance compared with lower cost, older gear oils, helping extend drain intervals under tough operating conditions.
• Built-in limited slip adpak: Includes a dedicated limited slip package so it can be used in differentials with wet brakes without adding separate additives.
• Outstanding scuffing protection: Exceeds Load Stage 13 extreme pressure requirements and offers protection against severe gear scuffing and synchronizer wear for long transmission life.
• Shear stable: Maintains viscosity and film strength under high load, high temperature and high shear conditions to preserve gear tooth protection.

Who It's For

The TRIAX Premium LS 80W-90 is best for fleet operators, heavy truck technicians and independent repair shops servicing mixed OEMs who want one oil that covers many hypoid gear, axle and transmission applications. It is especially useful where limited slip differentials and wet brake compatibility are common and stocking a single product reduces inventory complexity.

It is less suited to owners who require a manufacturer-specific narrow-spec lubricant mandated by warranty terms or passenger car owners looking for lighter viscosity gear oils. If a vehicle maker specifies a less common or synthetic-only oil, consult the vehicle handbook before switching.

Pros & Cons

Pros

• Very broad OEM compatibility reduces the need to carry multiple gear oils for different makes.
• Integrated limited slip additive avoids separate dosing and simplifies service procedures.
• Strong shear and oxidation resistance supports longer service life in severe duty conditions.
• High extreme pressure and scuffing protection help prolong transmission and differential life.

Cons

• Not a substitute for a specific synthetic or proprietary formulation mandated by some manufacturers; always check vehicle specifications.
• Packaging and drain interval recommendations are not detailed in the product description, so technicians must confirm change intervals from the OEM or lab analysis.

Specifications

Product	TRIAX Gear Premium LS 80W-90
Viscosity Grade	80W-90
Limited Slip Ready	Built-in LS adpak, no extra additive required
Application	Hypoid gear systems, differentials, manual transmissions, axles
OEM Coverage	Compatible with VOLVO, Mack, MAN, ZF, EATON and many others
Performance Traits	Severe service shear stability and oxidation resistance
Extreme Pressure	Exceeds Load Stage 13 requirements

Our Verdict

For mixed-fleet maintenance and heavy-duty applications the TRIAX Gear Premium LS 80W-90 represents strong value because it combines broad OEM compatibility with an integrated limited slip formulation and proven extreme pressure protection. Technicians who need one dependable gear oil for a wide range of trucks and axles will find it simplifies inventory while protecting gears under severe service.

Frequently Asked Questions

Can I use this oil in limited slip differentials?
Yes, it includes a built-in limited slip adpak and is formulated for limited slip differentials including those with wet brakes, so no extra additive is required.

Is this suitable for all truck and axle makes?
It covers a very wide OEM specification range including VOLVO, Mack, MAN, ZF and EATON, but always confirm the vehicle manufacturer specification before switching oils.

Does it offer long drain capability?
The formula emphasizes shear stability and oxidation resistance for extended life in severe service, but drain intervals should follow OEM guidance or oil analysis.