Used engine oil mixed with diesel fuel.

clyde said:

i see, you don`t do your own work, you let someone else do it! waste oil also runs heaters in large shops, in some places used oil is used on dirt roads, to keep the dust down in the summer! when i was a kid, used oil was re-refined, and sold cheep in service stations ($0.25) a quart! as i said, in europe most add 10% gas to diesel in the winter! i rremember in warm states, like california, they sprayed used oil along side the roads to prevent the grass from growing!...clyde

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Transaxial said:

Besides all the solids from combustion and additives in the oil, there can be corrosive acids that accumulate in the oil over time. That is the culprit in the discussion about whether to change oil before putting an engine into storage or after it comes out of storage. I think the majority would say change before storage to get those corrosive compounds out before sitting for a period of time. Sulphur in the fuel will combine with condensed water and form a mild acid which can go to work on close tolerance fuel injection components and damage them. Maybe this is not a big problem since Lepke is just centrifugeing his oil to clean the particles out but wouldn’t do anything for liquids ???

I wouldn’t burn used engine oil in any new high pressure common rail system for sure and probably wouldn’t on any system.

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