Here is a little something I compiled on taking some good pics of your car, I will add to this as I find more information/links.
When you shoot a picture, make sure the car is the primary focus of the picture. A cluttered background takes away from the car. Choose the location for the shot carefully. Look through the lens and see the picture. Does it flatter the car? Or does it distract from the car? Center the car and don't cut off the ends. Show the whole car, Also watch the shadows in your picture. Shoot from the lighted side and do not shoot into the sun. Shiny cars also reflect flashes and sun light. Shoot at an angle rather than straight on if that is an issue.
Take a series of shots of your car. Try different angles. Front shot, both sides, from the front corners, rear corners, and from the rear. Take a picture of unique things about your car like the emblem or shifter or the wheels. Look at the picture you see through the viewer, that's what the picture will be like. Does that shot flatter the car, or the background? Great shots come from a busy area using different lenses and focal lengths, focusing on the car and blurring the background. Engine and interior shots are difficult to get good pictures. After all how many ways can you take a picture of an engine? Play with several different angles. Interiors are tough because of poor lighting inside. You might try additional lighting to provide more light or do it on a bright day. If your camera is automatic, and its bright outside, your lens will not open enough for an interior shot. It will turn out too dark. You might try fooling your camera or use a manual lens
Imagination, practice and some luck are needed to get some great shots. The picture should say something about the car and maybe the owner. What do your pictures say? Nice tree growing out of the hood??? Or what a great shot of your car??? Look at the picture, where do your eyes go first. To the car or the background? Where do they go next?
