Traditional incandescent lighting illuminates around the perimeter of the dial

An Engine Running A High Oil Temperature Will Fail, As Proven Time And Time Again. Monitoring This Critical Parameter Ensures That You Are Running The Correct Weight Oil And That Your Oil Cooling System Is Performing Properly. Highly Accurate And Durable Thanks To Autometers Patented Air Core Meter Movement, A Single Wire, 1/8" Npt Temperature Sender Is Included.