PennGrade 1 20W-50 High Zinc Racing Oil – Single Quart
PennGrade 1 SAE 20W-50 is a partial synthetic, high-performance engine oil formulated for racing engines, classic muscle cars and demanding performance applications. Known as “The Original Green Oil,” it combines premium base oils with zinc and phosphorus anti-wear additives.
Its strong lubricating film helps protect bearings, camshafts, rings and pistons under high temperatures and heavy loads. The formula also provides resistance to foaming and viscosity loss from shear.
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Viscosity: SAE 20W-50
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Formula: Partial synthetic / synthetic blend
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Typical zinc content: 1,500 ppm
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Typical phosphorus content: 1,400 ppm
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Bottle size: 1 US quart / 32 fl. oz.
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Sold individually — price is for one bottle.
Use the oil viscosity recommended by your engine builder.
Application Note: Not recommended for vehicles equipped with catalytic converters.
