Correction, it answers the important question of “Approximately how far can I drive once the low fuel light comes on at the speed I’ve been driving?”
…because speed and environmental factors can change the answer by changing your fuel economy.
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Good point. Thank you.
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One other factor or two or three is the calibration of a particular gas station pump, the nozzle on that pump, the degree and direction of incline of the station property, the orientation of your vehicle in relationship to that incline, ambient temp and season. All of these will affect how much gas will go into the tank till it’s ‘full’ and therefore the measurable volume. How far you will go depends on whether you’re in the city or out on the highway.
Production vehicles all have a substantial amount of plus/minus allowance in their construction while still falling within production tolerances. Two “identical” vehicles can be a ‘lemon’ or the best car I ever had.
To make the long story short it depends(see all of the above).