Re: Fuel filter intervals on Audi 4000

[Phil@sievers.com (Phil Payne)]

In message <412508020195*/PN=glen.powell/OU=notes/PRMD=smclan/ADMD=attmail/C=us/@open400.smc.com> glen.powell@smc.com writes:
>   I think Audi says to change the fool filter every 30k miles, on
>   ur-Quattros and 4000s, etc. An expert Audi mechanic says to replace them
>   every 15k miles for maximum performance and throttle response.

I'd like to propose a sliding scale.  The fool filter catches any detritus 
thoughtfully supplied by your gas station at no extra charge, but also catches 
internally-generated rubbish.  In a new vehicle, perhaps for the first 60k or 
so, this is so close to zero that it doesn't matter.

In later life, corrosion becomes more widespread in the system.

I'd propose leaving the filter alone for the first 45k, and then applying one 
30k interval followed by 15k intervals - unless, of course, you replace the 
tank or major subsystem components. 

Phil Payne
Sievers Consulting UK
Vice Chair, UK Computer Measurement Group
Phone    +44 385 302803
Fax/BBS  +44 1536 723021
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