I changed the oil in the Regal yesterday after running a quart of HPL EC30 through her for the last 2k miles. Filter was run for a total of 6k miles using Castrol Edge Euro 5W30. I'd say the HPL did it's job!
A Fram FE9018 (WM hasn't had XG's in stock for ages) and 6 quarts of PP Euro L 5W30 went on/in. Give just how MUCH junk was captured by the filter, I think I'll run this combo for 5k miles and do another dump. I don't have a good access point on the engine to compare cleanliness before/after, but dang am I impressed with HPL's product!