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Old 02-06-2011, 07:59 AM
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bluebee bluebee is offline
Seek to understand,^Value
Location: San Jose, California
Join Date: Mar 2008
Posts: 25,236
Mein Auto: 02 BMW 525i M54 auto 130K
My revelations after reading this thread from Bill:
Hey Blue, check out this great oil article-really
  1. Synthetic refers to "properties" and not ingredients nor how it's made (same with semi-synthetic, i.e. "the big lie").
  2. The stock oil lasts the life of the engine; viscosity breaks down fast.
  3. "Synthetic oils made from pure PAOs or Diesters hold viscosity longer.
  4. Minimize viscosity spread by DIVISION (not subtraction)!
  5. Just because it says API SM doesn't mean it has been tested to be an API SM (I still need a better description of the visual-identification cues to understand how to reliably tell the difference)!
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