Understanding Gear-Oil Grading Systems

by AMSOIL
August 3, 2026

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AMSOIL SEVERE GEAR® 100% Synthetic Gear Lube

Gear oil plays a vital role in protecting the most heavily loaded components in modern drivetrains. From high-performance sports cars operating at extreme temperatures to heavy-duty trucks towing heavy loads, gear lubricants must withstand intense pressures, resist thermal breakdown and maintain a durable lubricating film under demanding conditions. In these environments, the wrong lubricant can quickly lead to increased friction, accelerated wear and costly component failure. As power densities rise and operating conditions become more severe, selecting the correct gear oil is more important than ever for maintaining reliability, efficiency and long service life.

See the August AMSOIL Magazine for more information.