I'm a new model s owner and I had my first experience with low tire pressure warnings. I pulled into my local gas station and used their free air hose to top off my tire pressure. I realize some gas stations charge for air and water for cars but this one is still free. I didn't buy gas and didn't shop in their convenience store. As I pulled out I wondered if I should continue to use the free air at this station. Where do tesla owners top off tire air pressure?