Lucas Racing Only Motor Oils are fortified with an additive package containing a high degree of zinc, moly and phosphorus that provides a tougher thicker additive film for maximum protection from metal to metal contact. Guarantees lower oil temperature for longer oil life and less metal fatigue 20W-50 petroleum. Has higher lubricity for faster acceleration and more RPM's. Protects against oil cavitation a must for high revving engines. Slows oil burning and raises oil pressure in worn engines. Provides good protection against cold weather dry starts. Stands up to high operating temperatures. Compatible with methanol or racing fuels. Synthetic is fortified with an additive package featuring light weight base oils with high levels of extreme pressure additives to provide faster acceleration, more horsepower and increased torque. Good choice in tight tolerance engine applications were light engine oils are optimum. suitable operating temps 190 degrees Fahrenheit or below. Use in engines with tight tolerances or light tension rings. Has higher lubricity for faster acceleration and more RPM's. Compatible with methanol or racing fuels.