Trip computer
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A trip computer is an onboard computer device fitted to cars which can generally record distance travelled, average speed, average fuel consumption, and display real time fuel consumption information. This computer can be found in various vehicles. Thus sometimes called the "car calculator", it can be very handy on long trips.
The first trip computers were installed in late 1970's General Motors products and are still usually reserved for more upscale cars although some lower-end models are fitted with them, often as an option. They can range from basic to complex. The most basic varieties of the trip computer incorporate average fuel mileage and perhaps an outside temperature display. Middle-of-the-road versions will often incorporate trip information into a bundle and include information on fuel, speed, distance, cardinal heading (compass), and elapsed time. The most advanced trip computers are reserved for high-end cars and often feature average calculations for two drivers, a stop watch, tire pressure information, an over-speed warning tone, as well as a multitude of other features.
Sometimes the trip computer display will be incorporated into the gauge cluster, into the dashboard or navigation system screen, or in an overhead console. Some vehicles will convey maintenance information to the driver to inform them of scheduled maintenance. The current Acura TL does this in stages, first alerting the driver with a 'Due Soon' message. Once the programmed mileage is reached, it alerts 'Due Now'. If the vehicle is driven past a certain point, the message will change to 'Past Due'. Mercedes-Benz vehicles constantly monitor the quality of the oil and alert the driver of the need of a change when the oil degrades to a certain extent.
