Several hundred miles, depending where you go.

From where I grew up, it's a four-hour drive to the nearest supermarket.

If you're in the US, you're probably not used to driving long distances on roads that aren't basically perfectly straight and four times the width of your car. You wouldn't enjoy driving here.

I'm not in the US.

I spent some time on Google Maps, and the furthest spot I managed to find from a town was about 35km. Note that I didn't say anything about supermarkets - this is a thread about car reliability, so the context is how far you can be from a town where it's reasonable to expect that someone can help you with your car.