do you trust the gas gauge of your car? most people are wary at first.
when they drive in a new car , they have to do some tests to discover how much to trust the gas gauge.
the typical way is to drive the car to lower and lower fuel estimates before refilling.
the true test, of course, would be to run out of fuel deliberately in order to seehow that corresponded to the meter reading , but most people don’t need that much reassurance.
rather, they do enough driving to determine how much to trust the indicator , whether it be the meter reading or the low-fuel warning light in some cars , or for those with trip computers, the miles of driving the computer predicts can be done with the remaining fuel.

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