Originally Posted by
3Cforme
Many new cars have electronic sensors that show fuel level with greater precision than somebody eyeballing the gauge. These can be accessed via wifi. They know you didn't use 'zero' gas driving 75 miles.
Avis has the whole Connected Car thing going on and I think they may use that where it's available, but Hertz and Enterprise (and subsidiaries) most assuredly do NOT bother to access that information. They still use the fuel gauge to the nearest 1/8, and lower-end cars' gauges are still notoriously inaccurate and poorly calibrated, contrary to reports upthread.