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Discussion Starter · #1 · (Edited)
What is this stuff? Remanufactured engine from dealership. Has only about 10 miles on it.
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the sediment on my fingers came from the thermostat. I believe it’s the same sediment in oil filter. The dealer ship tells me it’s copper from the thermostat.I don’t think a thermostat would break down like this.
 

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2012 JKU Gecko green no real upgrades yet...
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In most cases, a new engine will need its first oil change within about 500 miles because small particles (such as what you've found) will get flushed out from the engine build.
 
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