Lucas Oil Heavy Duty 80/90 Plus Gear Oil is fortified with special anti-wear agents and lubricity agents to control wear and drag as well as special additives to control heat. These features are not found in ordinary gear oils. This gear oil is both excellent for racecars and any heavy-duty application where plain gear oils just aren't good enough. Gear oils have needed improving for years, especially in the hi-performance industry. The Lucas 80/90 enjoys the technology Lucas developed in making the "Lucas Heavy Duty Oil Stabilizer", the number one supplemental oil in the heavy duty industry.