I have a 16 sti, bought it with 26k miles, I now have about 27k. I heard a funny chirping sound last night while leaving work so this morning I checked the oil & when I dipped the stick all that got oil was the very tip. I ran up, bought a filter, change bin, filter wrench (got the wrong size ) and some oil. When I changed the oil about 3qts of really black oil came out. I swapped the filter & refilled then topped off to the full hole in the dipstick. My chirp went away but I'm wondering if I should be concerned or just keep an eye on it.