Castrol GTX Classic 20W-50 Conventional Motor Oil, 5 Quarts

Castrol GTX Classic is a high-performance engine oil for push-rod, flat tappet engines and performance cam applications. It’s specially formulated for classic/collector cars, muscle cars, hot rods and race cars. It’s high zinc and phosphorus content helps prevent premature aging, wear and metal fatigue on engines with high tension valve springs or performance modifications that create high contact pressure and extreme internal temperatures.