Trip computer mpg accuracy"

I Feel Old · Jan 5th, 2019, 21:49

Says it all really.

In other marks they are renowned for their inaccuracy. I read here of owners checking the old fashioned way (filling tank, noting milage, filling tank, doing some arithmetic). Has this proven (or otherwise) that Volvo is accurate?

For interest; D4 XC60 showing 46.3mpg.

I-S · Jan 5th, 2019, 22:47

It is not accurate.

Orange line is trip computer, blue line is real.

Obviously tank-to-tank measurement comes with its own inaccuracies and variations (one pump clicks off sooner than another, different temperatures therefore fuel density, etc), but the point there is that other than one or two tanks, the trip computer is optimistic almost all of the time.

huron · Jan 6th, 2019, 09:13

I agree with the above. On my manual V70 Tdi a run to Gatwick and on to Eastbourne return from Bodmin was the only time they agreed, trip51.4, Tank full to full 51.4. Other than thay could be anything up to 5mpg different.
Hugh

I Feel Old · Jan 6th, 2019, 09:25

Many thanks guys' just the confirmation I was after, well I would have preferred it the other way really.

SwissXC90 · Jan 6th, 2019, 09:34

Average consumption in trip computer is never over a full tank, but from when it was last reset.
And maybe also only for a certain time

As an example the Range indication is very dependent on the driving style over the last 10 or 20 minutes

I-S · Jan 6th, 2019, 09:50

Range indication is as you say.

Av consumption is since last reset - i reset every time I fill up.

The Thong · Jan 6th, 2019, 18:52

I’ve had an 11mpg differential between the trip meter and the tank to tank calculation. The trip meter to me is seldom correct, tank to tank is always the best for me. I managed 56.2mpg on my V50 2d when my trip meter was saying 62mpg. I was well chuffed with 56mpg and that was in an all motorway run in good conditions at 62mph... I thought I was going to die of old age before I got there

On a combined run to Scotland and back where a fifth of the run was urban and mixed I still achieved 51mpg. In real world, this is a respectable outcome.

TT

Robbie34 · Jan 7th, 2019, 18:59

I found the trip computer on my Honda CR-V was fairly accurate. I mainly used the same Shell station and tended to use the same pump. Filled up to the third click off each time. The trip computer used to indicate about 41mpg, and full to full about 42mpg.

I haven't managed to work out the trip computer on my V60.

wombat3793 · Jan 8th, 2019, 00:19

Do all v70's have a trip computer?
Mine is a v70 2.5 Tdi - last of the classic shape. Feb 2000.
Thanks

Dippydog · Jan 8th, 2019, 09:01

I'll assume here Wombat that in this regard the diesel is the same as the petrol in which case my P1 has a rotary switch to the left of the steering wheel which gives options to display average consumption,instant consumption,distance to empty etc.

Jan 5th, 2019, 21:49	#1
I Feel Old Senior Member Last Online: Dec 19th, 2021 21:35 Join Date: Dec 2018 Location: Inverness	Trip computer mpg accuracy" Says it all really. In other marks they are renowned for their inaccuracy. I read here of owners checking the old fashioned way (filling tank, noting milage, filling tank, doing some arithmetic). Has this proven (or otherwise) that Volvo is accurate? For interest; D4 XC60 showing 46.3mpg.

Jan 5th, 2019, 22:47	#2
I-S Premier Member Last Online: Jul 22nd, 2021 23:43 Join Date: Aug 2006 Location: Huddersfield	It is not accurate. Orange line is trip computer, blue line is real. Obviously tank-to-tank measurement comes with its own inaccuracies and variations (one pump clicks off sooner than another, different temperatures therefore fuel density, etc), but the point there is that other than one or two tanks, the trip computer is optimistic almost all of the time. __________________ Our Car 2011 V70 D5 Geartronic Polestar - 38.6mpg over 45524 miles Replaced by

Jan 6th, 2019, 09:13	#3
huron Master Member Last Online: Dec 19th, 2020 16:24 Join Date: Apr 2009 Location: Bodmin	I agree with the above. On my manual V70 Tdi a run to Gatwick and on to Eastbourne return from Bodmin was the only time they agreed, trip51.4, Tank full to full 51.4. Other than thay could be anything up to 5mpg different. Hugh __________________ huron 2009 V70 2.4 geartronic in red.

Jan 6th, 2019, 09:34	#5
SwissXC90 Premier Member Last Online: Mar 20th, 2024 18:26 Join Date: Jan 2016 Location: Cross Country	Average consumption in trip computer is never over a full tank, but from when it was last reset. And maybe also only for a certain time As an example the Range indication is very dependent on the driving style over the last 10 or 20 minutes __________________ XC90 R-Design MY2009, Black Sapphire Metallic. HP-Sound, RSE, Nav, Tel, ParkingCam, BLIS, ParkingHeater, RestHeat, Removable Towbar, Summer: CRATUS 20x8 on Pirelli Scorpion Zeros 255/45, Winter: NEPTUNE 17x7 on Continental WinterContact 4x4 235/65.

Jan 6th, 2019, 09:50	#6
I-S Premier Member Last Online: Jul 22nd, 2021 23:43 Join Date: Aug 2006 Location: Huddersfield	Range indication is as you say. Av consumption is since last reset - i reset every time I fill up. __________________ Our Car 2011 V70 D5 Geartronic Polestar - 38.6mpg over 45524 miles Replaced by

Jan 6th, 2019, 09:25	#4
I Feel Old Senior Member Last Online: Dec 19th, 2021 21:35 Join Date: Dec 2018 Location: Inverness	Many thanks guys' just the confirmation I was after, well I would have preferred it the other way really.

Jan 6th, 2019, 18:52	#7
The Thong VOC Member Last Online: Yesterday 18:58 Join Date: Jun 2012 Location: The Independent Republic of Leamington Spa	I’ve had an 11mpg differential between the trip meter and the tank to tank calculation. The trip meter to me is seldom correct, tank to tank is always the best for me. I managed 56.2mpg on my V50 2d when my trip meter was saying 62mpg. I was well chuffed with 56mpg and that was in an all motorway run in good conditions at 62mph... I thought I was going to die of old age before I got there On a combined run to Scotland and back where a fifth of the run was urban and mixed I still achieved 51mpg. In real world, this is a respectable outcome. TT __________________ Never underestimate the power of stupid. It’ can’t be reasoned or negotiated with and you’ll never never beat it…. Cut your losses, smile and walk away Currently Volvoless but Thong will be back

Jan 7th, 2019, 18:59	#8
Robbie34 Junior Member Last Online: Apr 2nd, 2023 12:48 Join Date: Jul 2018 Location: Prescot	I found the trip computer on my Honda CR-V was fairly accurate. I mainly used the same Shell station and tended to use the same pump. Filled up to the third click off each time. The trip computer used to indicate about 41mpg, and full to full about 42mpg. I haven't managed to work out the trip computer on my V60.

Jan 8th, 2019, 00:19	#9
wombat3793 New Member Last Online: Dec 12th, 2021 23:25 Join Date: Mar 2006 Location: Wombourne	Do all v70's have a trip computer? Mine is a v70 2.5 Tdi - last of the classic shape. Feb 2000. Thanks __________________ P1 - V70 Classic - 2.5Tdi - Feb 2000

Jan 8th, 2019, 09:01	#10
Dippydog Premier Member Last Online: Yesterday 17:55 Join Date: Jun 2016 Location: S****horpe	I'll assume here Wombat that in this regard the diesel is the same as the petrol in which case my P1 has a rotary switch to the left of the steering wheel which gives options to display average consumption,instant consumption,distance to empty etc.

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