[BiturboS4] 10k service - OK

John M. Harrison JohnMH at uwyo.edu
Fri Aug 23 14:19:31 EDT 2002

I think the manual says 5-30 or 0-30.  I'll have to check again.  I've
been using the Amsoil full synthetic 0-30.  Reasoning per previous posts
is that the heat transfer characteristics of the full synth oils are
superior - important to cool the turbos, as well as the applicable ASTM
wear ball test results.

John M. Harrison  Laramie, WY  2001 S4 Avant silver

-----Original Message-----
From: Walter J Green Jr [mailto:vr6pilot at hotmail.com]
Sent: Friday, August 23, 2002 12:21 PM
To: matt_20v at yahoo.com; cfields72 at hotmail.com; biturbos4 at audifans.com
Subject: Re: [BiturboS4] 10k service - OK

>I use Mobil-1 15W50 (red cap) in all my vehicles
>including the S4, mostly from habit.  I know that
>Audi specifies lighter oil for the S4, but I suspect
>that is to try to increase gas mileage.  My '91cq
>has 160k miles on it now, most of it with the 15W50.
>I did try 5W30 on that car when it had 120k, and it
>leaked oil badly and burned up a quart every 1000mi.
>With 15W50, it is more like 1qt. every 4000mi, which
>has been consistent since I got the car in '92.
>Synthetic oil is pretty robust, I think either weight
>would be fine, though track days at 100F might
>justify the heavier wieght.  I'd shy away from
>anything 0W-x for anything south of the arctic circle,
>but just my opinion.

whoa! don't follow that lead carter. 15w50 is WAY to think & heavy for
engine, and more specifically, these turbos. *maybe*, if you operated
car on the surface of the sun, it would be necessary.

bad move. bad. it's contrary to logic, and the dealers/manuafacturers


'01 S4

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