2016.5 Mazda CX-5, AMSOIL 0W-20 Signature, 13,382/60,382 Miles with TBN Analysis

[alarmguy]

Its an ok report, personally I feel the engine would have done just as well if not better with any brand oil. Viscosity increase and Iron although acceptable, is just that, acceptable. Premium cost oil returning marginal results when any oil would do the same or better.

 

[buster]

Amsoil uses quite a bit more Mg than other oils that are using the Mg/Ca combination. Amsoil SS is around 989ppm of Mg and M1 is around 689 ppm of Mg. Random observation.