Miata Mailing List: May 1994, Message #125
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   From: "Robert Cohen" 
Subject: Re: Oil Changes/Pressure/Wa
   Date: Fri, 6 May 1994 09:50:17 -0400

        Reply to:   RE>>Oil Changes/Pressure/Was


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On 5/5/94 10:10 PM, Tom Manson wrote (some stuff deleted):

>...I did my first oil change on Mimi (up to now I had had it done
by a garage).... when I pulled the plug is was accompanied by a "strange"
washer...and on the inside diameter was what appeared to
be a rubber insert... Has anyone changed to Bosch filters and noticed [a]
pressure increase?  I am tempted to go get another Fram and put it on to
verify that it is the filter characteristic.

Comments?
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Well, I know I'm sorta new here, and what do I know, but...

The MCA magazine recommends using only the Mazda filters.
According to a download from Miataville about a year or so ago, 
there was a discussion about oil pressure changes similar to
what you have described---  A change back to the factory
filters apparently cured the "problem".  Since the filters and
factory washers can be obtained through many of the dealers
advertising in the MCA magazine at about $4.50 -$5.00, I just
buy 6 or so at a time, with the washers.  Never had a problem 
with leaking or oil pressure.

(The first time I tried to change the oil, I stopped by the dealer
to get the aluminum washers.  Believe it or not, they didn't have
a clue -- they eventually sold me a bunch of the wrong size 
washers, and I had to replace the old one.  

(The dealers who advertise in the MCA mag appear to be
much more knowledgeable.  That's also why my first post here
on the list was whether the engine oil plug washer was the same
size as the diff/transmission -- so I would have some idea of 
what to order, and be able to verify what the dealer thought).

Are the Bosch filters supposed to be better?  

Bob Cohen
'92 blue pkg b

robert_cohen@sdm.buffalo.edu
SUNY at Buffalo
(716) 829-3845 voice
(716) 837-7623 fax