Mastermax 85W140 and 80W90 API GL4/GL5 are premium mineral gear oils formulated to provide superior protection for mechanical gearboxes in heavy-duty vehicles. Their advanced additive package ensures excellent extreme-pressure performance, reducing gear wear and preventing scoring under high-load conditions. These oils exhibit exceptional thermal and oxidation stability, maintaining consistent viscosity and lubrication even at elevated operating temperatures. Designed for both GL4 and GL5 service classifications, they provide optimal protection for hypoid gears, differentials, and transmissions subject to shock and heavy loads. The oils also resist foaming and corrosion, enhancing operational reliability. Their robust formulation ensures extended service life, smooth gear operation, and reduced maintenance requirements, making them suitable for demanding industrial and automotive applications.




Mastermax 85W140 and 80W90 API GL4/GL5 are high-performance gear oils designed for heavy-duty mechanical gearboxes, offering extreme-pressure protection, oxidation stability, and reliable operation under high loads.
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