'88 Aries 2.5, 106K miles, runs well & quiet after it is warmed up - when cold, I could always hear the K clatter (piston wrist pins, I think). But the past 2 years, I am using the car a little more (which means more often on the weekend, it is not a daily driver). I top the oil when the dip stick shows it is lower than full, so I don't know, but guessing this could be 1 quart in 1000 miles. Currently using the larger Mopar filter, and Castrol Edge full synthetic oil. Oil is usually full synthetic, bounce around on brands - Mobil 1, Pennzoil, Castrol, using 5W30. Back in the 90's when it was a daily driver, I used to go with 10W30 in the summer. Are there any comments/recommendations/experience on what might not burn off so fast? I don't see any leaks or smell any oil.