The more basic problem here, highlighted in not a few accident reports, is that the widespread practice of departing with the fuel level below the visible point (which admittedly is "commercially necessary" on some piston twins especially if used for AOC charter work, where you never know in advance if a bunch of fatties will turn up) is likely to correlate with the practice of cutting things a bit fine on the "calculated" FOB at the destination
The worst combination is a low performance piston twin, occassionally used for both AOC charter work and self fly hire, with the customery crap/nonexistent/knackered instrumentation.
The best combination is an owner-pilot, flying 1- or 2-up, in a long range plane like a TB20
I have never, in my 8 years of onership, done a flight of any substance without departing with full tanks, and I never depart for any flight with less than 50% because that is the lowest visible-check level.