Join Date: Dec 2005
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Hello and welcome to the forum.
You can't rely 100% on the computer read out I'm afraid,I'd try the more accurate method of brimming the car,using it for a set distance,then briming it again.You can note the amount of litres you've used,then convert it into gallons,then divide the miles by the gallons and you'll get an accurate figure.If you do this over a decent mileage and repeat it a couple of times you'll get a better picture of your cars fuel consumption.
I would have thought that your 31.5 is a little low and you could expect something around 40,but a lot depends on how you drive it to be honest.
I'd rather push my Alfa than drive a BMW....
Currently in Lagdti's garage:
2004 Saab 9-5 HOT Aero and a 2001 Audi A3 1.8 Turbo