Kia Sephia

I've never ran out of gas in my Kia Sephia, but I've come close and certainly gone more than 10 miles with the gas light on.

The thing about the Kia, is that the gas light will go on when it gets low, and then after 5 miles or so, it will turn off, and then come back on periodically (every couple of miles). When it starts to stay on constantly after this fluctuation is when I generally go fill up. If I had to take a guess from when the gas light FIRST goes on, I would say 15-20 miles.