For f150 2019, you need to go to the menu and select settings. Proceed to advanced settings, vehicle, and the oil life reset. For other editions, go to the display mode on the main menu. Proceed to engine information and press the ok button for 3 seconds to reset the oil change light. The oil change light alerts you when you need an oil change. Sometimes, the mechanic might forget to reset it after an oil change. You could also be doing your oil change, and you would like to know how to turn it off.