Refined title: Castrol GTX Classic 20W-50 Motor Oil, 1 Quart, Pack of 6

Castrol GTX Classic is a high-performance engine oil designed specifically for push-rod, flat tappet engines and performance cam applications, particularly in classic/collector cars, muscle cars, hot rods, and race cars. Its formulation features a high zinc and phosphorus content, which helps prevent premature aging, wear, and metal fatigue in engines with high tension valve springs or performance modifications that create high contact pressure and extreme internal temperatures.

This Castrol Classic 20W-50 lubricant is suitable for use in automotive gasoline engines where the manufacturer recommends an API SJ or earlier specification 20W-50 oil. However, it is important to note that this product is NOT recommended for use in modern engines equipped with catalytic converters or in applications involving wet clutches.

The specialized additives in Castrol GTX Classic, including a maximum of 1400 PPM of zinc and phosphorus, provide exceptional wear protection even under the most demanding conditions. This formulation is designed to maintain a tough and thick oil film, ensuring superior lubrication and performance.

Furthermore, Castrol GTX Classic exhibits minimal foaming tendencies and demonstrates high resistance to thermal degradation, making it a reliable choice for engines operating under severe conditions. The product is compatible with both gasoline and alcohol-based fuels, providing versatility for a wide range of classic and performance applications.

In summary, Castrol GTX Classic is a high-performance engine oil that caters to the specific needs of push-rod, flat tappet engines and performance-oriented classic, muscle, and race cars. Its specialized formulation, with a focus on wear protection and durability, ensures optimal performance and extended engine life, making it a preferred choice for enthusiasts and collectors preserving the legacy of iconic automotive machines.

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