Instantaneous Vs Average

[WrathOfKain]

I have been watching the mpg recently on a few motorway runs and although i consistently get 35+ mpg for the majority of the journey on the instantaneous setting ..... when i look at the average it will be around the mid 20's ???

[kiwiV8]

I used to have the same query, then I realised when I am going heavy with my foot I'm usually concentrating on the road rather than checking out the instant reading (probably 1km/L during those exciting moments)

[Ukwide]

Originally Posted by WrathOfKain

I have been watching the mpg recently on a few motorway runs and although i consistently get 35+ mpg for the majority of the journey on the instantaneous setting ..... when i look at the average it will be around the mid 20's ???

The average reading is more indicative of your real world consumption figure...

[TruckbusUK]

TBH the onboard computer that works out fuel consumption is a fairy tale ... wouldn't worry about it. If the fuel consumption does interest you then do it manually on a brim to brim filling, its the only accurate way due to the consumption programming on the XC90 being done by Hans Christian Andersen.

[S60D5-185]

Originally Posted by TruckbusUK

TBH the onboard computer that works out fuel consumption is a fairy tale ... wouldn't worry about it. If the fuel consumption does interest you then do it manually on a brim to brim filling, its the only accurate way due to the consumption programming on the XC90 being done by Hans Christian Andersen.

Spot on!

I put diesel in my XC90 when it needs it and accept , as I have done from the start , that it is not an economical car.

Anyone worrying about fuel consumption on one of these has bought the wrong car.

[Tannaton]

My 03 XC90 will sometimes report over 40 mpg on a steady (65-70) motorway run but calculating it on a brim to brim - it's 35 on a very good day.

Urban mix is says 32-34 but at the pumps its 29-30.

My 15 XC60 however reports 36 mpg but at the pumps it's 37+

i.e. you need to calculate it on a brim to brim.

[robsterpaterson]

Originally Posted by TruckbusUK

due to the consumption programming on the XC90 being done by Hans Christian Andersen.

You, Sir, deserve more recognition for this line.

[robsterpaterson]

Double post.

[CondorXC90]

My XC90's instantaneous often shows a fairytale equivalent of 99.99MPG.......

If only!!!!!!

[Zebster]

Originally Posted by CondorXC90

My XC90's instantaneous often shows a fairytale equivalent of 99.99MPG.......

If only!!!!!!

That's the maximum limit, so would actually be quite reasonable when decelerating from speed