Tom Kendall wrote:

<snip>
Paul Lamar asked:

Anybody else have some info they can share?

Maybe.  I'm about to order new O-rings for my '93 20B.  This is probably
about as recent a model as Mazda produced, and the oil rings appear to be
two different materials and dimensions.  The smaller diameter O-ring is
green with a black longitudinal stripe, and they seem to be softer than the
larger diameter O-ring (silicone?).  It has a section diameter of a 0.125".

The outer (larger diameter) O-ring is black with a section diameter of
0.100".  Seems to be harder, probably Viton, Butyl, Nitrile, or some such.

Dunno if this helps any.

Tom Kendall

Thanks Tom. I highly recommend the teflon (TES) as I think they will
survive an overheat better.

Green with a black stripe is new. Never saw that before.

Paul Lamar
 
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