I use the same stuff, drain it at 7,000 and it is black, although this is essentially irrelevant. If you want to know how it is holding up, send a sample to Blackstone labs and get an analysis.tholmes said:I am 9,000 miles since I changed my oil last. I take it to a lube shop. I specify Mobil 1 extended performance (15k interval). What does your oil look like after 9k miles, pretty black or still has some brown to it? Thanks.