An Arizona woman who went to Walmart for an oil change claims she ended up with a blown up car instead. Nikki Smith says she narrowly escaped with her life when her Jeep went up in a ball of flames at the Walmart Auto Center in Phoenix — and it was just by the Grace of God she didn't have her three-year-old daughter strapped in there at the time, either. Smith told TooFab she brought the car to the supercenter on Sunday for a routine oil change.(snip) "After I took my car to Walmart I started noticing that my car...