I'm posting this in this section instead of the General section because it definitely has a lot to do with lubrication. I just wanted to see how many people here have over 150,000 miles on their original engines, to see what kind of oil you've been using and what kind of intervals. We talk about a lot of different oils on here, and critique a lot of UOAs, but the absolute best way to find out if any particular routine works, is to look at those people who have had success with it by getting long life from their engine! That is truly what we are all trying to achieve here. So if you've owned your car since new (or at least know the exact prior history of it from new), please step in and give us your input! I think this could be a very interesting topic!