Okay, changed the pcv valve, new plugs, no coolant leaks, but I am still burning oil after changing to High Mileage oil. I have about 800 miles on the new oil and I was a half of a quart low. Not sure what to do, I filled it up. I was really hoping that the Mobil 1 High Mileage would reduce or stop the consumption. I am starting to think it might have been silly switching to a High Mileage oil. Planning on changing around 3500 miles. I may go back to something a little cheaper or a conventional regular oil. Maybe the defy would have been a better choice. I have noticed that car does start up smoother with the M1, but I am not sure. Does it take time for the High Mileage oil to kick in, or am I being just a little optimistic.