Re: 5000 Mile Mobil 1 Change Interval

["BMD" <eurocar@gci.net>]

Consider the Factory's recommended service intervals. Almost no one drives
under "normal" conditions so should I always recommend changing every 3-4000
miles. With synthetic oils, the resistance to thermal break-down and overall
higher quality of the additive packages is so superior to petroleum based
oils it is reasonable to extend the interval, but never past the factory
limit. I have personally disassembled, or supervised disassembly, of dozens
of engines maintained to different degrees and even those using synthetic
oils don't look so good when the change interval was 15-20K (try that with
petroleum oils and you are lucky if any passages are not filled with
sludge). Go ahead and change at 5K, you are already doing so much more for
your car than 95% of the drivers out there.

Bryan Doughty
home.gci.net/~eurocar
----- Original Message -----
From: Christopher Gharibo <cgharibo@usa.net>
To: 20V List <audi-20v@emailsol.com>; Quattro List <quattro@audifans.com>
Sent: Friday, July 09, 1999 3:54 PM
Subject: 5000 Mile Mobil 1 Change Interval


> I have a '91 Audi CQ 20V (55k miles) and a '98.5 A4 30V (13k miles) that I
> have been maintaining on Mobil1/Audi Filters every 3000 miles.
>
> I want to increase this to every 5000 miles without hurting the life of
the
> engine.  My question is am I causing a meaningful decrease in engine life
by
> going to 5000 miles?  I would like to get the lists' opinion.
>
> Assume NJ weather, oil always topped up, both cars not driven that hard.
>
> Thanks.
>
> Regards,
>
> Chris Gharibo
>
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