[alfa] Oil becoming acidic

["Mauri and Bob Rand" <r-mrand@xxxxxxxxxxx>]

The "acid" test, pun intended, would be to measure the pH of the oil before
use and the pH after use to determine if corrisivity has changed and also to
what relative amount.  pH is a logarithmic scale and one step for example from
7 - 6 is about 10 time stronger than the lower.  IMHO- pH for between 5.5 - 8
is close enough to neutral to keep most metals okay especially high carbon
cams, etc.  Aluminum obviously is a lesser strength metal allowing corrosivity
to be more problematic.  Not a high worry item, but if you change oil at least
once a year for your casual driver, I bet things would okay.  I have not seen
an engine fail because of corrosion.  But again, I'm just a personal mechanic
with experience(s) as my teacher.

Take care

Bob Rand
'87 spider quad
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