[DMCForum] Re: Oil Change Intervals

["cruznmd" <racuti1@xxxxxxxxxxxx>]

Ah I see. My first oil filter was a "Wix" brand that was a freebie 
from John Hervey. I am now running the Purflux that supposedly has 
this check-valve in it. I did observe a rubber membrane over the 
circulation holes that the Wix brand filter did not have.

That's very interesting to know.

--- In DMCForum@xxxxxxxxxxxxxxx, "Andrei Cular" <acular@xxxx> wrote:
> Rattle on startup has as much to do with the filter as it does the 
oil.  A
> good filter with an anti-siphon valve that works will keep oil up 
in the
> engine much longer.  So now when you start to turn over engine over 
the pump
> doesn't have to fill the filter first, and the oil gets to the 
lifters much
> quicker.
> 
>  I run mobile 1 0-40 in my Porsche.  When cold the crank goes 
around 3
> times, on average, before the engine starts and in those 3 
revolutions my
> oil pressure gets up to 3bar(43.5psi).  With convention 20-50 it 
would take
> a couple a second or two after the engine started for the pressure 
to get up
> that high.
> 
> 
> 
> Andrei
> 
> 
> 
> ----- Original Message ----- 
> From: "cruznmd" <racuti1@xxxx>
> To: <DMCForum@xxxxxxxxxxxxxxx>
> Sent: Wednesday, December 10, 2003 8:26 AM
> Subject: [DMCForum] Re: Oil Change Intervals
> 
> 
> Ha! Man that's cool. I'm not going to do it, but cool nonetheless.
> 
> I say it was time to change the oil because it was dirty, and it was
> the wrong type for the cold weather. When I'd start, I could hear
> things rattle dry for about 1.5 seconds while pressure built up, 
also
> evidenced by my gauge.
> 
> I started up this morning in 30 degree weax and could not obeserve a
> measurable time period where I could hear the engine rattle, plus 
the
> gauge pressure rose during cranking, not just when the engine became
> self-sustaining.
> 
> Walt: I was wondering why this thing had such a large sump. Now I
> know. Thanks for that knowledge.
> 
> Also, people were wondering if I wrecked or already had blown rings
> when I finished my head gasket replacement job. I was pleased to
> notice that the oil level never went down due to burning past worn
> rings. There's no blue smoke from the exhaust either.
> 
> 
> --- In DMCForum@xxxxxxxxxxxxxxx, "Andrei Cular" <acular@xxxx> wrote:
> > OK let me end this oil change debate.  For $20 you can have an oil
> analysis
> > performed and a change interval tailored to fit your engine and
> driving
> > habits.  Blackstone labs www.blackstone-labs.com does it and
> provides a very
> > nice report and recommendation.
> >
> >
> >
> > Andrei
> >
> >
> >
> >
> >
> > ----- Original Message ----- 
> > From: "Walter Coe" <Whalt@xxxx>
> > To: <DMCForum@xxxxxxxxxxxxxxx>
> > Sent: Wednesday, December 10, 2003 1:49 AM
> > Subject: [DMCForum] Re: Oil Change Intervals
> >
> >
> > > Question isn't "why change oil frequently?", is "why not?"
> >
> > Okay, I'll take a stab at answering the "why not".  The
> > DeLorean's PRV is a 6 cylinder version of an engine that was
> > originally designed to be an 8 cylinder diesel.  As such,
> > the oil passage ways and the blah blah and the blah are all
> > heavy duty and hold nearly 7 quarts of oil vs other engines
> > that hold only 5 quarts, the 7 quarts don't get dirty as
> > fast; blah, and the owners manual specifies 7500 mile
> > intervals, so doing it at 2500 is a waste unless you have
> > short spiked hair and wear an ear ring and do unusual (major
> > blah!) things with your tools.  I should have a curfew so I
> > don't do these weird posts this late.
> >
> > blah = I don't feel like explaining it, I really don't know
> > it that well, and you wouldn't agree with me anyway, so
> > blah!
> >
> > Walt
> >
> >
> >
> > To unsubscribe from this group, send an email to:
> > DMCForum-unsubscribe@xxxxxxxxxxxxxxx
> >
> >
> >
> > Your use of Yahoo! Groups is subject to
> http://docs.yahoo.com/info/terms/
> 
> 
> 
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