pizza delivery drivers: car maintenance?

I just had an interview with my local Domino’s Pizza. The manager said he would hire me (YES!!) However I am worried about the damage it will do to my car. How delivery driver maintain their cars without having them break down? Tips please?

How much do most pizza delivery drivers make a day in tips?

I heard that pizza places only pay minimum wage to their delivery drivers so the driver has to rely on tips to cover gas, car maintenance, etc. After expenses can they earn a decent income? How much?