What is going on with these rod bearings?

My current home has a Generac home generator. It came with the house, it was programed to run every Wednesday at 9:00 am for 8 minutes . Guess what the oil looked like? I now run it once a month for 30-45 minutes no more moisture in the oil.
It's time to overhaul your engine, it will have several other issues besides odd looking bearings. My '72 318 had good looking plugs when I bought it, supposedly under 100,000 mi, it showed 69, something, then I noticed that the numbers did not line up on the speedo. It was hemorrhaging oil. I decided to go through it, very glad that I did , rods were into the copper, timing chain was shot, valve guides, cam was flat, it took 30 over to clean it up. The lifter galley was full of lead from good old regular gas! Just overhaul it.