I like including some kind of car shape to further define your business, but overall too hard to read, especially at a glance (ie: people seeing your rig on the street). See user DJ's Details. His is very easy to read, but his: 'car line' tells you a bunch.
Perhaps keeping the car but doing something different with the name (which doesn't really need to include the '.com')
Keep at it....logo design is terribly difficult and everybody has a different idea of perfect