the second one in this series is pretty good. I dont like the over exposure on the hood though: i would have under exposed the whole shot to keep the highlights and then brought the shadows up in post a bit. I like this one because the mountains follow the curve of the car. there are also few distracting elements in this photo (other cars, random trees, fences, etc...).
the one in your next post with a flash is decent, but the flash is too powerful and you cant see the rest of the car because it gets lost in the shadows. I like this because you have more than just a car. the person you put in the photo adds so much to the photo that you cant get with just a car. I think adding in different subjects to some of your other shots would make them more appealing because you can start to tell a story with more subjects in the photo and it becomes less of a snapshot of a car.