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Spectral analysis will give you additive package breakdown, will tell you what aromatics are in the oil, give you how moisture and coolant content in the oil, and will tell you metallic components as well as various readouts of other components either base or manufactured by the "engine". You...

To know whether or not if Amsoil is good or not, one has to perform a spectral analysis on used oil. BUUUUT...... It has to be from a source user that operates under identical conditions with Brand A, Brand M, Brand C, or Brand "Whatever". Otherwise every opinion is just that, an opinion with...