|
||
|
7th October 2019, 17:58 | #11 |
Doesn't do things by halves
Rover 75 2.5 Connoisseur Auto (1999) Dealer launch model. Join Date: Mar 2007
Location: Former Middlesex
Posts: 20,366
Thanks: 1,587
Thanked 3,749 Times in 3,181 Posts
|
Dave,
It's clear from your useful posts that there are far too many variables involved to draw a reliable conclusion. The only way that you're going to judge your fuel consumption accurately is by abandoning the on-board display and the Fuelly software and replacing those with a brim-to-brim manual calculation over a full tank. I suggest that you do this when your wife begins her motorway & dual carriageway journey to work and report back with the result. That is the only way that you're going to get a figure which you can trust. Simon
__________________
"Whatever is rightly done, however humble, is noble." Sir Henry Royce. |
7th October 2019, 19:54 | #12 | |
This is my second home
MG ZT CDTi Join Date: Jan 2014
Location: carrick
Posts: 7,859
Thanks: 3,494
Thanked 2,657 Times in 1,973 Posts
|
Quote:
Trip 1 is the lower display Trip 2 is the upper display (I wondered about this for a while too) I do not know what fuelly is or does (I can guess), I prefer to use the brim to brim, and as long as I get a consistent mileage from each fill, I am happy (that is my choice though ), but I imagine providing you enter the details correctly to fuelly, it will be accurate. However from what you mentioned previously you expected a drop due the moving around the yard whilst it had work done (that would be a lot of moving though), I am suspecting the IPK was sent away during this time. Perhaps now that it has been reset (it would be by the battery off or being unplugged) that the car is being driven relatively normally. If that was the case this could explain the massive disparity. I would suggest resetting the fuelly if this is possible, to start afresh. Reset the display too, at the same time, and start from scratch. As well as this, recalibrating the 'fuel correction' would be a good idea, as T-Cut mentions previously (LINK)
__________________
It is not gloss primer .............. it is duct tape silver! |
|
17th October 2019, 18:03 | #13 |
Regular poster
Rover 75 Tourer Join Date: Jul 2016
Location: Castle Donington
Posts: 41
Thanks: 12
Thanked 2 Times in 2 Posts
|
The 75 has been put into regular service with the fair wife and the first set of results are in;
(I always brim the tank) so; 49.10 litres / 4.54 = 10.8 Galleons! 286 miles / 10.8 = 26.5 mpg - Fuelly says exactly the same. Just a bit worse than the 2.5 litre manual, four pot 944 which incidentally pulls a frantic 3,400 rpm@70 mph. The trip computer is still away with the fairies, so with that, the outdated sat-nav & the defunct telly, I've managed to find the off switch. |
17th October 2019, 18:42 | #14 | ||
Doesn't do things by halves
Rover 75 2.5 Connoisseur Auto (1999) Dealer launch model. Join Date: Mar 2007
Location: Former Middlesex
Posts: 20,366
Thanks: 1,587
Thanked 3,749 Times in 3,181 Posts
|
Hi Dave,
Thank you for the first set of data. As a fellow owner of a 2.5 litre automatic I'd say that an average of 26.5 mpg for .... Quote:
We therefore have to consider your wife's driving style and the service history of the car. Quote:
Simon
__________________
"Whatever is rightly done, however humble, is noble." Sir Henry Royce. |
||
18th October 2019, 19:26 | #15 |
Regular poster
Rover 75 Tourer Join Date: Jul 2016
Location: Castle Donington
Posts: 41
Thanks: 12
Thanked 2 Times in 2 Posts
|
My next will be better, I've got a hunna mile round trip up to a nano meet tomorrow, but let's see the maths for your last tankful, then.
|
19th October 2019, 14:32 | #16 |
Regular poster
Rover 75 Tourer Join Date: Jul 2016
Location: Castle Donington
Posts: 41
Thanks: 12
Thanked 2 Times in 2 Posts
|
211 miles - 32.01 litres = 7.05 galleons = 30mpg = a PB.
|
21st October 2019, 00:25 | #17 |
Gets stuck in
MG ZT-T Join Date: Jun 2016
Location: White Rock, BC on Canada's Pacific Coast
Posts: 849
Thanks: 338
Thanked 367 Times in 210 Posts
|
I find the Trip Computer on my ZT190 is also about 10% optimistic compared to calculating consumption over several tanks.
The manual ZTs mileage is about 25% better than my previous V6 Freelander auto though. That was an unexpected surprise!
__________________
ZT-T190, Anthracite, LHD, Left the Line on June 24, 2002, Sold new in Switzerland, spent time in Germany, Imported to Canada in September 2021 |
|
|