Why are petroleum lubricants widely used in machines?

Petroleum lubricants are widely used in machines because they offer a combination of essential performance characteristics and economic advantages. They are preferred for their:

• Versatile Viscosity: They are available in a broad range of viscosities, allowing them to meet diverse functional requirements, from high-speed spindles to heavy-duty gears.12
• Stability and Protection: They exhibit low volatility and provide chemical inertness, which resists deterioration of the lubricant itself. Furthermore, they offer effective corrosion protection for sliding surfaces.12
• Cost-Effectiveness: They are generally available at a low cost compared to many synthetic alternatives.1

Since the rise of the petroleum industry in the 19th century, these products have largely superseded animal and vegetable lubricants. Their performance can be further enhanced through the use of additives—such as antioxidants and detergents—or by utilizing long-chain polymers to create multigrade oils that maintain effectiveness across varying temperature ranges. While synthetic lubricants may offer superior stability in extreme conditions, petroleum-based products remain the standard for a vast spectrum of industrial and automotive machinery.134