[BiturboS4] 10k service - OK

[S Stiles]

No, I don't think you're wrong. I think your instincts are right here.
However, we do know that Audi redesigned the oil return lines from the
turbos in the '01'ish timeframe, and at the same time started recommending
0w oil for the later cars. This leads me to believe the system critically
depends on good oil flow, especially at startup.

So, yes, it's absolutely (IMHO) a good idea to warm up your car before
hitting the boost, as you suggest. What I'm most worried about, however, is
lack of oil flow at startup, which is a point where the wear risk is very
high. 0w oil definitely helps in this regard.

Scott


>From: john sonty <erhti at yahoo.com>
>To: biturbos4 at audifans.com
>Subject: RE: [BiturboS4] 10k service - OK
>Date: Mon, 26 Aug 2002 08:22:06 -0700 (PDT)
>
>Yes, but IMO, Audi did that b/c most here in the U.S. are
>clueless in caring for their cars, eg., just start the darned
>thing and drive like you stole it.  Yes, perhaps the oil lines
>were designed 'ineffectively' but it also well could be that S4
>owners were just plain getting on it too early, no?  Did the
>early Euro S4 turbos/lines have the same issue??
>
>My friend who has a NA engine in his car claims his intention is
>to keep the car long-term, eg., ~10+ years. However, after cold
>start-ups, he immediately gets on it every time (to redline
>much, as well) and drives the car hard most of the time. When I
>tell him that his car won't last 10 years driving like that
>without proper warm-up, he debates that NA engines are
>'different' than turbo-charged ones, etc..  Well, yes, they are
>different but I tell him that the bottomline is that both
>engines are working with 'cold' oil and that without proper
>flow/lubrication, he is causing excess premature engine wear. Am
>I wrong??
>
>
>
>--- S Stiles <stiles_s at hotmail.com> wrote:
> > Just following up on this thread w/one more bit of heresay:
> > - we have notoriously bad flow to our turbos (this was
> > redesigned in mid
> > 2001, IIRC, but it's still not great
> > - Audi went from 5w to 0w to improve initial flow of oil to
> > turbos on
> > startup
> >
> > I'm going out of my way on this car to use exactly what the
> > manufacturer is
> > recommending, and have switched to 0w on our 00.
> >
> > Scott
> > '02S4Avant
> > '00S4
> >
> >
> > >From: "Walter J Green Jr" <vr6pilot at hotmail.com>
> > >To: chip at auguricorp.com, biturbos4 at audifans.com
> > >Subject: RE: [BiturboS4] 10k service - OK
> > >Date: Fri, 23 Aug 2002 19:26:25 -0400
> > >
> > >><<I get better lubrication with the thicker oil.>>
> > >>
> > >>This is only true when the oil gets where it needs to be.
> > The requirement
> > >>for easy flow characteristics is due to tight engine
> > machining tolerances
> > >>and small oil passageways that need significant flow to
> > provide
> > >>lubrication.
> > >>Our turbos have no bearings, they ride an a layer of oil.
> > If your oil is
> > >>too thick to get to the turbos IMMEDIATELY upon startup
> > (with high cold
> > >>viscosities, it will take time to ooze through tiny
> > passageways), for
> > >>instance, you will damage the turbos.
> > >>
> > >>--Chip
> > >>
> > >
> > >thanks man, i didn't think i was crazy. I know i'm not a
> > physicist,
> > >engineer, or rocket scientist, but i like to think my brain
> > functions on
> > >some level.
> > >
> > >heh.  ;)
> > >
> > >__________
> > >WJG
> > >'01 S4
> > >
> > >
> >
> >_________________________________________________________________
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> >
> >
> >
> >
> >
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