Hi all, First post but have spent a lot of time lurking in the background. Just wanted to share the results of my Blackstone UOA on my wife's 2015 BMW 328i X-drive using Pennzoil Platinum 5/40 Euro. I changed the oil when we first bought it and have driven 6200 miles in the past year. She drives nice and easy but I beat it like a rental. I used PP 5/40 Euro again for this oil change and will most likely stretch the OCI out to 7500-8000 miles. Advance Auto had a great price on this oil, 5qts for $25. Thanks for looking.