Most propane tanks don't come with a gauge to let you know how much fuel is remaining. And you definitely don't want to run out and have to make a trip to the store in the middle of cooking.

Propane tanks typically come in 20-, 30-, and 40-liter versions, with 20-liters being the most common for backyard grills. Let's say you've used some sort of tank gauge and determined there's ...

After filling your tank, your car's gas gauge may stay on full for a day or two before the needle starts creeping toward empty. That's because auto engineers have calibrated our gas gauges to lie ...

The most common type of tank gauges are manufactured by Simsbury, CT-based industrial-technology maker Veeder-Root. While they can be protected by a six-character password, most are not.

And when the gas goes under one-third of a tank, the fuel gauge drops to "E." Above that, the "Distance to Empty" computer reading does some weird things.