PennGrade 1 Collection

PennGrade 1® High Performance Oils reduce internal friction for increased horsepower output while maintaining their strong lubricating film protection even under the most demanding torque and extreme temperature conditions.

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The Original Green Oil.


Family Owned & American Made

50 Years +

Multi-Generational Lubricant

Manufactured in the USA

It is the same unique base oil cut and the specially selected high-zinc, high-phosphorus formulation that’s been known and trusted by high-performance engine builders and vehicle owners for decades.

PennGrade 1 High "Performance Oil is the best there is!"

- Jonathan Laun

The oil comes out as green as it goes in. I love this product! Happy customer."

- Josh Hibner

Now THAT’S customer Service with a capital S. Thanks again with a capital T."

- Bill



A product of D-A Lubricant Company, PennGrade 1® High Performance Oil is “The Original Green Oil.®" With its tenacious clingability and enhanced levels of zinc and phosphorous chemistry, PennGrade 1® gives your hard-working engine the performance and protection it demands and deserves.

PennGrade 1®

The Origins of the Original Green Oil®

PennGrade 1®, “the original green oil,” comes from a long history of innovation and evolution. Our story began with Kendall GT-1 Racing Oil circa 1965 at the Kendall Refinery in Bradford, Pennsylvania.

Kendall GT-1 used the unique Pennsylvania-grade base oil cut in its formulations. Many famous racers, such as Big Daddy Don Garlits (Swamp Rat), Bruce Larson (USA-1), Kyle Petty and V (Vieri) Gaines used Kendall GT-1 to power their race cars to numerous world championships.

Brad Penn

American Refinery Group

WITCO Corp. sold the Kendall Motor brand to a third party in 1997, and the refinery was sold to American Refinery Group, Inc. ARG then started its own brand of motor oil called Brad Penn (short for Bradford, Pennsylvania).

Brad Penn PennGrade 1 High Performance Oil

Original green oil was back and better than ever!

Around 2002, after racing enthusiasts inquired about a racing oil in the vein of Kendall GT-1, ARG launched Brad Penn PennGrade 1 High Performance Oil. And yes, the color was green just as the GT-1 was for all those years. This oil was an instant success with drag racers, hot rodders and oval track racers (both dirt and asphalt) as well as vintage, muscle and classic car enthusiasts. With the unique Pennsylvania-grade base oil and the enhanced zinc and phosphorus (ZDDP) package, the original green oil was back and better than ever!

D-A Lubricant Company, Inc

Flagship Product to PennGrade 1

Then in 2015, D-A Lubricant Company, Inc. acquired the Brad Penn Finished Lubes division from ARG and shortened the name of its flagship product to PennGrade 1. It’s the same great oil, just with a new brand and quart bottle.

A multi-generational lubricant

50-Plus years

This oil has been around 50-plus years for good reason. A multi-generational lubricant, PennGrade 1® stands for a long and continued history of pride, passion and protection.