Honestly looks like it was run on veggie oil or B100 possibly.
When Waste Vegetable Oil or WVO is ran in a diesel it needs to be heated to a very high temp to burn properly. Even so it still won't burn completely on a cold engine and some will leak down past the rings into the crankcase. Some engines even do this when up to temp so the key is change the oil earlier and run constant UOA to make sure you are not getting polymerization.
What happens to my knowledge is the WVO & engine oil mix to form a jello like consistency through time & heat exposure. Some chemical stuff occurs that I can't explain and viola you get a oil pan full of oil gelatin.
Considering it was sold preloved the previous owner knew about it and tried to get rid of the engine. Short of pulling the heads or pan you would never know, that is until pickup screen is blocked.
Clean out the pan & pickup screen. Dump some engine flush in engine to try & flush out the head passages with fresh oil, hopefully the bottom end is still in one piece.
When Waste Vegetable Oil or WVO is ran in a diesel it needs to be heated to a very high temp to burn properly. Even so it still won't burn completely on a cold engine and some will leak down past the rings into the crankcase. Some engines even do this when up to temp so the key is change the oil earlier and run constant UOA to make sure you are not getting polymerization.
What happens to my knowledge is the WVO & engine oil mix to form a jello like consistency through time & heat exposure. Some chemical stuff occurs that I can't explain and viola you get a oil pan full of oil gelatin.
Considering it was sold preloved the previous owner knew about it and tried to get rid of the engine. Short of pulling the heads or pan you would never know, that is until pickup screen is blocked.
Clean out the pan & pickup screen. Dump some engine flush in engine to try & flush out the head passages with fresh oil, hopefully the bottom end is still in one piece.