On a 2014 FE350, I just changed my oil for the first time. There is an icon on the speedo of a wrench that is supposed to appear when the selected oil change interval has been reached. In my manual, it explains how to turn the icon off, but it reads as though that stops the wrench icon from appearing at all. Am I interpreting this incorrectly, or is there a way I can reset the wrench icon so that it will tell me when I need to change the oil?