for some reason, he bottomed out at some point in time, and he was leaking oil from the filter, seeing that the filter is upfront and not in the back. So after losing a lot of oil, his engine started knocking real bad. even after adding more oil and letting it run for a while it ticking wouldn't stop. So he took it back to the shop to get the motor replaced.
unique(adj): to break off from the crowd and do your own thing