Tribological contacts between plastic or polymer materials can exhibit stick-slip behaviour that generates noise. Tribological properties can be influenced by lubricants such as bonded coatings, greases, and fluids. In this paper, well known theories about polymer friction from the literature will be shown to be useful in the development of new lubricants. Theoretical results have been validated with a Ziegler Stick-Slip Test Rig. The test methods presented in this paper are used in the development of lubricants for automotive applications (in the interior of the car including invisible lubricants developed for Class “A” surfaces).