Selecting the right lubricant requires matching the viscosity grade (ISO VG for industrial or SAE for automotive) to the equipment's operating temperature and load. You must prioritize synthetic lubricants (PAO or Esters) for extreme temperatures and high-pressure environments, while mineral oils are suitable for standard, cost-sensitive applications. Always verify the Base Oil Category and the Additive Package (such as Anti-Wear, Extreme Pressure, or Anti-Oxidants) to ensure compatibility with your specific machinery.