The early 20th century marked the dawn of a transportation revolution, with cars becoming more accessible to the general public. As car ownership grew, so did the challenges of vehicle maintenance. One of the key tasks in maintaining a car was changing the oil, which led to the need for a specialized tool to remove and replace oil filters efficiently. Enter the oil filter wrench—a device that simplified the job and became a staple in every mechanic’s toolbox. In this article, we’ll explore the history, functionality, and lasting legacy of the oil filter wrench.