I used this filter for about 13k miles.10k with m1 0w40 and 3k with supertech synthetic 5w30 mixed with the remaining quart of m1 0w40. I left the oil in and threw another microgreen on. My intent was to see if I could do the whole 30k on the m1 0w40 and microgreen filters but the uoa I sent in after nearly 10k was never seen or heard from since. After waiting 1 1/2 months I just changed the oil. I plan on just using the rest of the microgreens for 15k each and will fci and oci separately. The microgreen filter is an all-around excellent filter in my book. Thick can, media was like barely used after the long fci. It has the silicone adbv and the 2um micro disk for extra filtering. As long as I can get these mg on eBay or wherever for a good price I'll keep using them on this car for 15k.