I sell cars for a living....I think it's okay to test drive a car with no intention of buying it. I look it as a potential sale. You may think you have no intention of buying it and it's my job to help you make an informed decision.
Now if your going to buy a car from the same dealership just a different car....I say take all the time you need. However, if your buying it somewhere else or know for sure your not in the market for one......just don't take up too much of the sales rep's time though. A quick test drive is still okay by me
