What is motor oil tan?

Motor oil tan refers to the color change that occurs in motor oil as it oxidizes and deteriorates over time. Fresh motor oil typically has a light amber color, but over time, it can darken and become more opaque as it breaks down. This change in color can be an indicator of the oil's condition and may indicate that it needs to be changed. Additionally, dark and discolored oil can lead to engine damage and decreased performance, so it is important to monitor the color of your motor oil and change it regularly to maintain optimal engine health.