lets ee don't change the oil until there is a leak. I once new a guy who told me once he never changed the oil, just added new oil when level was low. you car is way past due for a tranny flush. I did mine at about 80.000 k and it may have not needed it but it sure felt better once it got changed. oil was dark and etc. anyway, best advise is not listen to the old man and read your onwers manual. some may think that the owners manual is only printed to get the manufacturers extra money but trust me is is printed for a reason and maintanance is far cheaper then fixing a broken whatever
