Used oil analysis needs to tell you how low your Total Base Number got to (acid neutralizer), total silicon (dirt ingestion), iron content (cylinder and cam wear), water content/coolant content (head gasket rupture/thermostat stuck open), aluminum and copper content (plain bearing wear), and viscosity at 212°F (viscosity improver depletion).
There's a couple other stats.
Ooo!!! Volatility. Very important.
There's a couple other stats.
Ooo!!! Volatility. Very important.
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