* Driving style: Aggressive acceleration and braking will reduce your range.
* Terrain: Driving uphill consumes more fuel than driving on flat ground.
* Vehicle condition: A poorly tuned engine or other mechanical issues can affect fuel efficiency.
* Fuel level at light activation: The light usually comes on when there's still a reserve of fuel left, but the amount varies between vehicles and even from fill-up to fill-up.
Generally, expect between 30 and 50 miles after the low fuel light illuminates. However, it's risky to push it to the limit. Running out of gas can damage your fuel pump and leave you stranded. It's best to refuel as soon as you can after the light comes on.