The diesel engines that do burn these oils are built for it. All of that old oil is burned by ships as bunker fuel. Bunker fuel needs to be heated to burn, also since the engines are so much larger then ours small metal particals in the oil don't really matter.

However they still cannot shut down on bunker fuel, they must switch to diesel and run the bunker fuel out of the system to shut the engine down.

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1999 SL500
1969 280SE
2023 Ram 1500
2007 Tiara 3200