Mmmm, Porsche flavor. I don't think I could pull off 15-50 up here year round. Maybe as a summer weight, but too cold here in the winter. Purple is borderline ridiculous. I've got a buddy who has used it in all of his aircraft engines, and have seen what it does over the life of an aircraft engine, so I'm sold. Dropped his cylinder head temps an average of 180 degrees, gave an extra thousand or so hours between rebuilds. For him it's a cost savings. Good news is he's the distributor in his neck of the woods up there, so I get it essentially at cost.