Bill Freeman wrote:

Paul,

Check out these for info on the new technology lube base oil and
Conoco lube oils made with them.

    http://www.conoco.com/about/major/hydrocracking/

     http://www.conoco.com/images/buy/hydroclearpdfs/hchp.pdf

    http://www.conoco.com/images/buy/hydroclearpdfs/hcsas.pdf

Check out

    http://www.pennzoil.com/TechData/Bulletin//DomesticMarketing/ProductAppl
ications/pdf/p01.pdf

This says that most Pennzoil 2 stroke oils are ASHLESS, while some
competitors and one of their oils are LOW ASH, and the additives are
*not* compatible.  Seems like ashless would be best for rotaries.

  Check out this one - sounds like rotaries definitely want the ashless
  outboard motor oil, esp for AC applications i.e. constant load.

http://www.pennzoil.com/TechData/Bulletin//DomesticMarketing/ProductApplicat
ions/pdf/p15.pdf

Bill

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