Mercury – Oil Temperature Gauge | Dual Scale | Black Face | 2-1/8" (52 mm) | 79-8M0054360Mercury Oil Temperature Gauge Dual Scale Black Face 2 1 8" (52 mm) 79 8M0054360 Overview The Mercury Oil Temperature Gauge (79 8M0054360) gives you a clear view of your engines oil temperature so you can make sure everythings running in the safe zone. It features a dual scale display showing both Fahrenheit and Celsius, making it easy to read no matter what units you prefer. With a black face, white markings, and a glass lens, its sharp, easy to read,