Member Since: 17 Aug 2005
Location: SE England
Posts: 459
OBC mpg
Many of you have reported that the OBC gives a much more pessimistic tally of average mpg when compared to working it out yourselves.
Mine seems to be opposite
Last 2 tanks, the OBC has shown 19 mpg but my calaculator shows 17.4
It is about 4.5L to the Gallon, isn't it?
20th Dec 2005 11:30 am
simon
Member Since: 11 Jan 2005
Location: Shropshire
Posts: 18296
How many miles have you done ?
Mine has gone from 26 ish up to average of 30 MPG. Manual though. And now cleared 32K miles.
-s
20th Dec 2005 1:21 pm
CFB
Member Since: 02 Dec 2005
Location: Bradford, West Yorkshire
Posts: 6100
Sounds very low, my car is only a week old and the OBC is reading 28-30mpg which tallies with my manual records. Mine is a manual TDV6, I assume you aren't driving a V8 Auto? 2020 BMW X1 18d XDrive X-Line Auto
20th Dec 2005 1:23 pm
ricric
Member Since: 27 Nov 2005
Location: Somerset
Posts: 85
Mine is two weeks old and giving an average of 28.2 (Diesel automatic)Zambezi Silver SE / Ebony Leather
20th Dec 2005 3:31 pm
Desarzens
Member Since: 23 Nov 2005
Location: Crassier
Posts: 81
During my one-day test drive of an TDV6 HSE auto (a cold snowy day), the OBC returned a quite acceptable 23.5 mpg and got exactly the same with a manual calculation.
20th Dec 2005 3:38 pm
croyde
Member Since: 17 Aug 2005
Location: SE England
Posts: 459
I'm afraid that it is constant nose to tail London traffic, school runs and down to the shops, all very short journeys.
Car has about 3000 on the clock and was new in Sept 05 Oh! and it's a TDV6 S.
My BMW 323 only averages 17 mpg in London traffic so I find the Disco quite reasonable for a big vehicle.
At the end of Summer when we were doing day trips with the kids we were getting closer to 26 mpg with a half an half mix of round the houses and A road blasts.
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