Too make it easier.
1.) You will get better shots approx 30 minutes before sunset sunrise. Sunrise gives better lighting imo and its magical, (sorry love lighting), when the light information goes orange and the dark information (shadows) go blue literally in your photo.
So when you are shooting on automatic, hit the "flash" button to off, this will make your camera shoot at a slower Shutter speed, and a larger aperture. This is okay, but you need a tripod, make sure your camera is metering your car which it should if it focuses on your car. You will be suprised how many better shots you get.
Also important work with 3rds compose the car into 3rds of the photography.
Have any other questions email me:
Clint Earhart Fashion Photographer