PennGrade 1® Monograde High Performance Oils are specially formulated using high quality, premium base stocks and select additive technologies to meet stringent lubricating demands of high performance, highly stressed street and racing engines.

PennGrade 1® Monograde High Performance Oils deliver excellent shock load and high temperature protection to heavily stressed engine parts including bearings, camshafts, rings, and pistons. They reduce internal friction for increased horsepower output while maintaining their strong lubricating film protection even under the most demanding torque and extreme temperature conditions. These high performance formulations also possess good anti-foaming and shear stability characteristics, excellent high temperature protection from thermal breakdown, outstanding film strength, and strong anti-wear properties.

THE PENNGRADE 1® LEGACY

Based in Lebanon, Ind., our company has Indiana roots as deep as the traditions and values of the “Hoosier” state. The D-A Lubricant Company has been the proud manufacturer of quality lubricant products since 1919. Today, the D-A Lubricant Company includes the brands PennGrade®, PennGrade 1® as well as D-A Lubricants.

PennGrade® Motor Oil is built from the legacy of PennGrade 1® High Performance Motor Oil, or “The Original Green Oil®”. It is the same unique base oil cut and specially selected high-zinc, high-phosphorus formulation that’s been known and trusted by high-performance engine builders and vehicle owners for decades. More history.

PERFORMANCE PROVEN

While the name and look have changed, the performance you have come to know and trust has not. “The Original Green Oil®” is still alive and thriving. And our tests prove it. Test details.

PennGrade 1® High Performance Oil is a product of D-A Lubricant Company that stands out for its unique clingability and enhanced levels of zinc and phosphorous chemistry. This combination ensures that your engine receives the performance and protection it needs under various conditions.

So, whether you're pushing your engine to its limits on the street or the track, PennGrade 1® ensures that every moving part is safeguarded against wear and tear. Its unique formulation is trusted by high-performance engine builders and enthusiasts alike, making it a top choice for those who demand the best for their engines.

Also available, #3039 Case (12 1-Quart Bottles)