My oil has 3000 miles on it now and is clean as a whistle. Supposed to change at 6000. I may or may not depending on how dirty that oil is. I'm all ready with 9 qts of Mobile 1 0w40 a top sider to suck out the oil and a K&N oil filter made in Germany ($8 at advance auto)... I'm gonna put on a tuxedo before I change the oil this time, just so I can say I did it....