That would be a PITA on a car. Foolproof though, no gauge to trust being accurate. Something like older bikes.
For many decades, popping the tank open and sloshing the gas around was how you did it with motorcycles. Never trusted the gauges on newer bikes, always double checked.
The car I was driving before the VW was a ‘67 Riviera Gran Sport, which got 9 MPG in town, 12 on the road. (It’s a long story.) The VW got some incredibly high mileage compared to the Buick, so I was constantly checking the gas level afraid to run out at any minute. Comical, now that it’s over.