Additive Metals

Magnesium, Barium, Calcium, Phosphorous, Zinc

These metals tend to remain fairly stable, but can easily fluctuate 20% as a normal circumstance. Drastic changes, or elimination or emergence of an element that was or was not formerly present usually indicates the addition of make-up lube whose additives differ from the supplier's. It could also indicate that the supplier has changed formulation of the oil. Remember, it is possible for a wide variety of and quantity of additives to be used to meet the same spec. Also, remember that the level of additives detected is not necessarily an indication of the useful life of such additives.