We see plenty of fuel exhaustion events in the NTSB wreck reports, and we suspect some might have been avoided with fuel totalizers. These are valuable devices, especially when interfaced with panel GPS navigators, because you’ll always know how much fuel you’ll have to a given waypoint in the flight plan.
Better yet, if your long-term plan includes a big-screen engine and fuel monitoring system, you can likely still retain some of the hardware that’s used in a basic, low-cost fuel totalizer installation. Here’s a scan of the market.