Miata Mailing List: February 1996, Message #96
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   From: Scott A Maccabe 
Subject: Re: Quick question
   Date: Fri, 2 Feb 1996 15:52:00 -0500

YES,  I bought a used Miata and put synthetic in after 87,000 regular oil 
and all the seals started leaking.  If you go back and forth you should 
only leave it in for 50 -100 miles and change it again.  The reason for 
this I am told is that either oil is fine but when they mix it drestroys 
your seals.  so if you go from one to another change the oil very shortly 
thereafter.

Scott 
90 RED ( Driven in the snow and salt all the time, with no rust I might add)

On Fri, 2 Feb 1996, Can Altikulac wrote:

> Hi gang,
> 
> I left my M&M for the 30,000 mile maintenance stuff, and i was using 
> synthetic oil for a while. Well they put regular oil instead. I am not 
> very familiar with the pros and cons and i DO NOT WANT to start which oil 
> is better discussion again, but do you guys and gals think that i should 
> change the oil immediately and put synthetic? I heard horror stories 
> about what happens when you go back and naturally i don't want to hurt my 
> engine.
> 
> thx
> 
> -Can Altikulac & M&M with 10/30
> 
>