The M1 ranged from 60 to 68 during the test. The Amsoil has ranged from 66 to 71 so far.
Mobil 1 uses quite a bit of Boron and I'd say that helps M1 retain it's TBN so well.quote:
Calcium Borates are gaining polularity as part of the Boron family of additives.
These should show up as low potassium, high-calcium/high-boron ppms in UOA's.
They are used primarily as detergents in fully formulated oils, but are found to be
anti-oxidation, anti-corrosion, and anti-wear agents.
In addition, they provide a very stable and robust TBN.
I don't think RATE of mileage accumulation has much affect.quote:
the fact that mileage is accumulating differently is bad enough.
It didn't. Blackstone changed their TBN testing method during the Mobil 1 test.quote:
Originally posted by Don Stevens:
The fact that the TBN testing procedure has changed during this test ...