Miata Mailing List: July 1993, Message #6
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   From: Jeff Cerier 
Subject: Re: dealer put regular oil in my miata!
   Date: Thu, 1 Jul 1993 12:43:39 -0400




On Wed, 30 Jun 1993 commike@lgc.com wrote:

>
>
> I've been putting Mobil 1 in my 90 miata since i bought it used last
> november. The warrantee is up in a few weeks, so i thought i'd bring it
> to the dealer and have them try to find what's going to break the day after
> the warrantee is set to expire. :^)
>
> Since i have just over 45K, they said they could do a 45K mile service. I
> wasn't paying much attention and told them to go ahead. Well of course
> they replaced my Mobil 1 with Exxon Superflow! ARRGH. I just changed it
> a few weeks ago too!!!
>
>
> So now i'm wondering what to do. Leave the oil in and then change it back
> next oil change? Take it out right now? Or just forget about Mobil 1 all
> together. Are there real benifits to using a synthetic if the oil is changed
> on a regular basis??
>
> 	...alan

I'm a loyal Mobil 1 user in my Porsche 914, VW Passat, Toyota p/u, and
plan to run it in my newly purchased (3 wks ago) 91 Miata.  You can
actually feel the difference the oil makes in the Porsche air-cooled
engine, and in air-cooled motorcycles.  It's a hard thing to describe, but
you can feel when the oil starts to break down.  I guess the engine
doesn't run quite as smoothly.

As for your Miata, I'd run it for 1500-2000 mi to get your money's worth
out of the conventional oil change, then switch back to the synthetic.  My
_guess_ is that it takes that long for the conventional oil to start
breaking down.

On a related note, I'm wondering what others opinions are on brands of
synthetics???  I've always used Mobil 1, but I know that there are other
brands now.  Any discussion?

Jeff Cerier