How to check for sludge ?

[Ed Kellock]

I'm changing the oil this week in two V8s and a 91 Avant.  This will be my
1st oil change in a year.  I'm using Rotella 5W40 in the V8s (nice gallon
jugs, 2 per car please, and 5 bux cheaper than the corresponding Mobil 1
synth) and Mobil 1 10w40 in the 242k mile Avant (unchipped).

One V8 may have accumulated 10k miles over the past year.  The other maybe,
maaaybe 5k.  The same 5k for the Avant.  

Synthetic oils are supposed to allow longer change intervals, right?  

Ed
 


-----Original Message-----
From: quattro-bounces at audifans.com [mailto:quattro-bounces at audifans.com] On
Behalf Of thejimrose
Sent: Monday, November 01, 2010 9:14 AM
To: Hayes Myers
Cc: quattro at audifans.com
Subject: Re: How to check for sludge ?


disagree with 'change more and often'. 3k mile intervals is a COMPLETE waste
of oil and $ IMO. 5k [at least] intervals miles is more reasonable and
plenty safe even for a chipped motor. i've been changing the oil in my 1.8 t
every.. once in a while... ish or the past 100k miles and makes great
compression and no sludge [m1 0w40 with big filter and seafoam every other
change]. k04 and ecu for 90k miles [100 to 190].

its not like the ecu makes the engine run hotter longer - you get more boost
on wot runs, for a few seconds at a time. yea temps will go up, yea it's
harder on the oil for those few seconds, but the car has a radiator and
intercooler for just such eventualities. probably less than 2% of total
drive time is the 'chip' doing anything. as long as you're not running her
hard and putting her up hot you'l be fine.

i never sit w/ the car idling either. just stay out of boost the last 10
mins of a drive to cool it down.

On Mon, Nov 1, 2010 at 8:01 AM, Hayes Myers <hayesmyers at gmail.com> wrote:

> Since going with a modified ECU i was told to change oil at 5k which I 
> am doing (3000 miles/5000 km)...and its some lubromoly crap (ok 
> ok..pretty awesome stuff). I comply with the 5000 km interval i was 
> advised on....especially since i'll be heating the oil up that much 
> more in my turbo and have the potential for coking with this heat 
> cycling etc.  Af for checking for sludge, i think maintenance records 
> are helpful... and then the check under the filler cap would be 
> useful.  From there....change the oil more and mroe often to avoid 
> issues.
>
> On Mon, Nov 1, 2010 at 10:46 AM, thejimrose <thejimrose at gmail.com> 
> wrote:
>
>> pulling the pan is pretty major surgery.
>>
>> pulling the drain plug and scraping is more 'bend and cough' than 
>> 'pass the bonesaw'
>>
>> On Mon, Nov 1, 2010 at 7:42 AM, Grant Lenahan <glenahan at vfemail.net>
>> wrote:
>>
>> > yea, i was thinking pull the pan, but that's a bit of a big deal at 
>> > this stage.
>> >
>> > honestly, service records are your best indicator. They dont sludge 
>> > if maintained!
>> >
>> > Grant
>> >
>> >
>> > On 11/1/2010 10:22 AM, thejimrose wrote:
>> >
>> >> ive been told you can pull the drain plug and scrape around w a 
>> >> bent coathanger in the oil pan for goo.
>> >>
>> >> if the oil cap / flashlight method yeilds questions you might try 
>> >> that. _______________________________________________
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>> >> http://www.audifans.com/mailman/listinfo/quattro
>> >> http://www.audifans.com/kb/List_information
>> >>
>> >>
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