We've never had any oil usage (over 100k miles currently), but last week my wife was stuck in traffic for five hours and she idled pretty much the entire time. I had checked the oil a couple weeks ago and after 8,000 miles on this oil change it was just barely under the full mark. Today I changed the oil and checked it before draining and it had used 1/2 quart in probably only 500 miles. I'll keep an eye on it going forward but either it has just flipped a switch and started burning oil at an alarming rate or the idling had something to do with it. Curious if those that have the oil usage do a lot of idling or city driving.