Castrol 15E809 GTX Classic 20W-50 Conventional Motor Oil, 5 Quart Jug

Castrol GTX Classic 20W-50 conventional motor oil (15E809) is made for classic and collector vehicles with push-rod, flat tappet engines and performance cam applications. It suits muscle cars, hot rods and race cars that need the extra zinc (ZDDP) and phosphorus protection older engine designs call for. It comes in a 5 quart jug.

Key Features:

• 20W-50 viscosity grade, conventional formula
• High zinc (ZDDP) and phosphorus content for anti-wear protection in high-stress areas such as flat tappet cams and high-tension valve springs
• Helps maintain a tough, thick oil film under severe operating conditions
• Minimal foaming and high resistance to thermal degradation
• Compatible with gasoline and alcohol-based fuels
• Meets or exceeds API SJ

Important: Not for use in modern engines with catalytic converters or in wet clutch applications.