In the most recent (March 2013) ON Kurt Schrader did a great piece on "Choosing an Engine Oil for Your Bike". On page 72 he talks about Total Base Number Results (TBN) and references one synthetic (MOA16) and one petro (MOA10) "stand out" in their ability to absorb corrosive acids produced during combustion. Excuse my ignorance but how do I identify these two oils by their MOA16 and MOA10 reference?