I’ve been fixing up a TL, and just got around to changing the oil on it. Noticed a small amount of milkshake so I dropped the pan. Thin layer of milkshake in the pan so I looked up and I can’t tell if these are casting marks or cracks in the block. They look like cracks but they are in the same place on every single cyl so that leads me to believe they are casting marks. Anyone have any idea? I couldn’t get a good pic of cyl 1 but it looks the same as the others. 2-6 are below along with a pic of the oil pan.