Quote:
Originally Posted by V8Nissan
When you drain the oil, I would let the engine sit at least overnight and then not start it before draining it. See if the water / coolant separates to the bottom. Blackstone oil analysis is also an option if you can get a sample container quick enough or use another clean container for the oil until you can get one. They would be able to tell you exactly what it is most likely.
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Another easy way of checking oil for water contamination is to CAREFULLY drizzle the suspect oil onto a hotplate or similar. If the suspect oil snaps, crackles, and pops then it has water in it. If is just flashes/evaporates away its not contaminated.