1. Global energy consumption due to friction in passenger cars
2. Global energy consumption due to friction in trucks and buses
3. Synthetics, Mineral Oils, and Bio-Based Lubricants
4. MarketsandMarkets. (2019), “Synthetic Lubricants Market by Type (PAO, PAG, Esters, Group III), Application (Engine Oil, Hydraulic Fluids, Metalworking Fluids, Compressor Oil, Gear Oil, Refrigeration Oil, Transmission Fluids, Turbine Oil), Region—Global Forecast to 2023,” Available at: https://www.marketsandmarkets.com/Market-Reports/synthetic-lubricant-market-141429702.html (accessed July 4, 2020).