These are great looking filters ran 5400 miles on dealer oil probably qsgb bulk.or at least what they told me. They gave me a free oil change at our 3 year anniversary think that they just wanted me there to try and sell me a new one but I'm happy with this one so far. Almost 39,000 miles and it's been perfect.always used qsgb at 5k oci this change though I went with super tech synthetic and a Fram tough gaurd and plan on a 7500 oci. From now on. Any grit you see is from cutting. ][/url] ][/url] ][/url] ][/url] ][/url]