[A4] drifting gas mileage display

[Larry Velez]

Peter,

This list does not get much traffic - sadly.  

But I will try to chime in.

Make sure you are looking at the Average MPG and not the realtime figure which changes often and drastically.

I don't think you can use the realtime figures for any concrete conclusions.

If you use Facebook, look for the A4 and Audi groups which are rather active.

Good luck,

Larry
99.5 B5 A4
2002 B5 S4

-----Original Message-----
From: A4 [mailto:a4-bounces at audifans.com] On Behalf Of Peter Kirby
Sent: Friday, April 29, 2016 8:08 AM
To: A4 list <A4 at audifans.com>
Subject: [A4] drifting gas mileage display

I am looking at buying a 2008 A4 Avant.  During our test drive last night,
I noticed that on a flat road with steady throttle, the instantaneous fuel
mileage indicator would slowly drift up and then slowly drift down, etc.
Is this an indicator of O2 sensor going south?  I can't get a straight
answer out of the owner about oil consumption but am wondering if oil
consumption is contaminating the O2 sensor....  Any thoughts.

Thanks.

Peter
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