quattro Digest, Vol 52, Issue 55

[Rick Cone]

I wouldn't worry if your engine isn't sludging.  reference 50 year old unrestored engine with crap oil.  Engine clearances are set with a certain oil in mind.  A tight-built engine designed for light oil will suffer damage when run on 20-50.  On the other hand, I had a 327 built by a guy that swore by 20-50.  I tried to run it on lighter oil, and it used like crazy.  Put 20-50 back in it, and the oil usage instantly disappeared.

Also, many oil manufacturers recommend breaking in an engine on dino oil, then switching to synthetic after 10k or so.  Otherwise the engine won't break in and the rings won't seat.  I know a fellow that built a race engine (first timer) and broke it in on 0w30 amsoil.  14k into the motor, it smoked like a chimney, as it had since new.  He took it back to the builder, thinking it was bad.  Engine teardown revealed a brand new looking engine that the rings hadn't even seated in yet.  He put it back together, same rings and everything with regular oil, and the smoking was gone in about 1000 miles.


----- Original Message ----
From: Ti Kan <ti at amb.org>
To: Dan DiBiase <d_dibiase at yahoo.com>
Cc: thejimrose <thejimrose at gmail.com>; quattro at audifans.com; ekellock at gmail.com; uglydog56 at yahoo.com
Sent: Monday, February 25, 2008 5:28:10 PM
Subject: Re: quattro Digest, Vol 52, Issue 55

Yup.  I run Mobil-1 0W40 in my '01 S4 biturbo, and have done so since
about 5K miles new, now the car has close to 80K miles with absolutely
no sign of sludge or any other malady.  The new Audi engines do require
thinner oils so they provide adequate lubrication while cold, and I
trust Audi's specs when it comes to various engine fluids.  The factory
engineers know what they're doing.

-Ti

Dan DiBiase writes:
> Not sure why you'd be nervous, Jim. I mean, if Audi recommends it (and I use the same in my car) then you're okay. I know you're probably out of warranty (as am I) but I've been using this since the first oil change and no evidence of any sludging in my engine.
>  
> Dan D
> '04 A4 1.8Tq MT-6
> Central NJ USA
> 
> ----- Original Message ----
> From: thejimrose <thejimrose at gmail.com>
> To: quattro at audifans.com; ekellock at gmail.com; uglydog56 at yahoo.com
> Sent: Monday, February 25, 2008 5:11:45 PM
> Subject: Re: quattro Digest, Vol 52, Issue 55
> 
> ok well that makes me even MORE nervous about the 0w40 M1 i run in the a4 as
> per audi's recc's. i dismiss the parts counter guy's comment of 'OIL
> FLAORVED WATER!' whenever i buy it. =/
> 
> 
> > > The first question is what temps are you running in during the winter.
> >  That would determine the bottom number for me.  The "if it ain't broke,
> > don't fix it" part of me says stick with what you've been using.
> > > My friend Tony is an engineer with experience in oils.  He says the
> > additives that make an oil multi-viscosity actually fight it's lubricative
> > properties.  His recommendation is to run straight weight oil as much as
> > possible, light in winter, heavy in summer of course.  He says to always run
> > the oil with the narrowest spread between the numbers as it lubricates the
> > best.
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-- 
Ti Kan
http://www.amb.org/ti
Vorsprung durch Technik


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