Although the color of grease typically doesn't impart any performance properties, it is often used as an initial indicator of quality. In this article, we discuss several factors:

• The way color is evaluated can be the issue, not the color of the grease itself
• Shortcomings with eyeballing samples to compare their color
• The science of color
• A better way to analyze color

Click here to read the article in Lubes 'n' Greases.