Here's the scenerio. I bought a BMW X5 6 months ago with 83000 miles. I did the first oil change and it appeared that the previous owner took the extended oil change idea a little too far... the oil was brown and looked like chocolate pudding. The cartridge filter was so full sludge after the oil drained off of it the filter was covered with thick waxey sludge that looked like clay. I refilled woth 0w-40 Mobil 1. I ran that oil for 1,000 miles drained it and changed oil and filter Mobil1 0w-40. During both of the changes it was using a half quart a thousand miles. I changed a few weeks ago after 7,000 miles. I have about 1,000 miles on that change and the oil level is right up to the upper level on the dipstick. It appears to have not used any oil. Could the engine have healed Thy Self? Or should I call the Pope to inform him of a verifiable miracle... there's got to be a patron Saint of motor oil... right?