Hmm that’s interesting, I noticed similar patterns in oil once before when I needed a head gasket, this engine consumed water and was under water for short period or time, however this is the second oil change since then and only after about 200 kms I noticed this, seems like a lot of water still in engine, coolant level stable
Those are Turing patterns induced by a reaction-diffusion system of two previously homogenous liquids becoming destabilized.
Basically, you had a non oil substance mixed in with your oil for a long time and now it’s separating. My guess is water.
Hmm that’s interesting, I noticed similar patterns in oil once before when I needed a head gasket, this engine consumed water and was under water for short period or time, however this is the second oil change since then and only after about 200 kms I noticed this, seems like a lot of water still in engine, coolant level stable