Where is a better place to work. Sonic Drive-In or a gas station?

I'm 17 and a senior in high school. I want to buy an IPhone and try to save up my money for a car by my sophomore year of college. I put in an application at a gas station and a month went by and they never called so I put one at the new Sonic Drive-In close by. I got two new voicemails yesterday from both places wanting to set up job interviews! My friend worked at a different gas station and said she made $200 a week. (She works at the one I applied for now). And sonic only makes $2 an hour but they sometimes make a lot based on tips. So which one would you pick if you were in my situation?

Gas station would be a little more reliable - you're not going to get huge tips at a Sonic, since people think it's fast food, and the cost of any meal is pretty cheap.

Good carhops average $25-$75 a day in tips based on overall sales volume of the location in question. Don't discount fast food. It pays well when you find a good spot.