chuck dunlap wrote:

I am gathering data on what I think may be a failure mode for
the oil o-rings. Please answer these questions.

Does you engine use oil?

YES

If so how much per hour or miles per quart?

1 Quart per hour but most of that is an oil leak I just found today. Was
1qt per 3-4 Hours before oil leak.

Does your engine smoke when you start it up?

 No

What year is your engine?

1986

Did you overhaul it?

Yes

If so what date did you do it?

December 2000

If so what color were the oil O-rings?

Stock Mazda, Black I think

Do you use Mobil 1?

Yes

Did you ever overheat the oil?

Yes

If so what temp did it reach?

223F after the cooler

Chuck Dunlap

Thanks Chuck. 

Some of the late oil O-rings are
green and I think Mazda changed the material.

My 83 12A RX7 with only 65K on it started smoking for some strange
reason and using oil. I use Mobil 1. I wonder if Mobile 1 is attacking
the oil O-rings or does not swell them like regular motor oil.

No oil leaks as far as I can tell. I am thinking
of taking it apart to find out why.  If I do I will install
a complete set of teflon (TES) O-rings to get some street experience.

BTW did you take the prop off to check for smoke?

Anybody else have some info they can share?

Paul Lamar
 
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