I just received the oil analyse regarding a sample of used oil from a civic 90 engine. The car is not driveable, but the engine is still in "good" condition. The civic was rotten in my neighbor's backyard for more than 10 years now. I was curious about the condition of the engine oil in this car, so I took a sample of this oil and send it to Black stone for analyse. When I received the oil analyse, I was surprised that the oil is still in good condition and the TBN is still high after 10 years. Any thought about this?
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