The oil you buy probably has a recommended amount of mileage on it, "Good for xxx miles!" the text will usually read. When sending in a sample of the used oil, though, we often find ourselves recommending an interval that contradicts whatever is promised on the label, and some owners (rightfully so) want to know, "What gives?" In episode 76, Blackstone Joe is here to break down one of those very same instances, where the results, one in particular, really, called for a careful approach before extending the interval. The oil you run can certainly make a difference in some results, though, and that's why Blackstone Joe breaks down another example of how high levels of one particular metal can be directly related, and harmlessly so, to the oil the owner used. Enjoy!

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