I had to go to take 200 mile trip for work. Before I left I noticed the clack, clack sound that usually means it's time for more/new oil. Before I went I had mazda change the oil and filter (I didn't have time to do it) But when got the car back it was still making the same loud noise. I had to make the drive so I trucked along. I still got the same gas milage but this noise is getting annoying. It only happens from idle to 2k, then it stops. Anyone have any ideas?