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I read about the S60 2.5T getting 7.2/100 km. Couldn't figure out when I drove on the hwy and it mostly showed it steady at 7.9L/100km and sometimes 8.5L/100 km . So, filled up before and after trips just to measure. Found I was getting much better mileage then the computer showed. Around town, the unit showed 13.5L/100 km. In reality it was 10L/100km.

There must be a way to get it flashed or something. I picked up the car used from a Volvo dealer. 2 weeks ago. Anybody have a similar problem?

2005 2.5T w/ 80,000km
 

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Yes they are notoriously off (on all cars). Nothing you can do about it.
 

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It's a rolling average according to the ECU, not the actual mileage, it changes all the time depending on your driving.

Have you tried to reset the trip info when you refill, this will start the averages over again and eliminate and distortion caused by previous trips.

I find that the mpg and miles till empty work out just fine when compared to gas receipts and my odometer.
 

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Re: (SJHesketh)

Quote, originally posted by SJHesketh »
So to reset the MPG figure, you just reset the trip mileage on the speedo?
On the knob that twists to select what reading you want to display, turn it until you are diplaying the MPG average, and then hold the RESET button on that same lever the knob is on, for a couple seconds , and the MPG average will be reset.
 
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