I didn't mean I 'consume' a quart of oil between changes but when I change my oil every 3000 miles I never get 4.2 quarts out. I always get 3 or a little better. Every honda is like that. Or for that matter all high revving engines. If you fill up with 4 chances are you are not going to get exactly 4 quarts back out of a high revving engine such as my si. They do burn oil in the process. Anyway, you guys bring up a good point about coolant in the oil I was thinking backwords. However, I just changed my oil 5 days ago and it was clean as a whistle.