Some time ago I turned away from Amazon as an institution of organized misery of people picking and delivering what I might decide to order in the evening after having consumed the news. And about the same time ago I registered with "Oelcheck", some ubiquitous service from the neighbourhood that did my oil analysis and still stores the result for eventual trending if I went on with them. Now I won't as they recently stopped selling their sets themselves to the individual and drove that over to Amazon. Currently need to repair my engine, then drive it some, then drive it even further I guess. Whoever in Belgrade or Honolulu might want to analyse oil can tell me where to drive then. Any will be the better direction.