Panning is the technique of moving the camera when you shoot so that the car stays sharp but the background behind it blurs.
A quick example:
Not mine, I hasten to add. Just the first thing that popped up on Google!
There is a tutorial
here
You can always use the same settings that someone else has used before (like from EXIF data on Flickr) but they won't work perfectly if the light levels are different or the sun is in a different place. They will be a good starting point though.
What I would do is put the camera in shutter priority mode (S on your mode dial) and select something thats in the same sort of range as the photos you've seen on Flickr. The camera will select the aperture to match (and possibly the ISO depending on your settings).
Then take some test shots and see how the come out. If the car is blurring, use a shorter shutter speed.