An ODOMETER is an 8-letter device found on a dashboard gauge that measures the distance traveled by a vehicle. A DIAL is a 4-letter device that is used to measure and display a variety of readings, such as speed, temperature, or pressure. GAS is a 3-letter fuel source that is used to power a vehicle's engine. OIL is a 3-letter lubricant that is used to reduce friction and wear in the engine. All of these components are found on a dashboard gauge and are essential for the proper functioning of a vehicle.