Just a tip on quoting MPG figures from the DIS. DON'T. It's a complete waste of time, due to it completely and utterly over-exaggerating the actual. My A3 does it by circa 15% consistently.
You say you're getting 42mpg, yet you're going 400ish miles to a tank? Now, I might have the stats for the fuel tank wrong (64litres in the A4?). But lets be generous here, and assume you actually get 450 to a tank. That works out as 32mpg. Which is pretty ****. Lets even be more generous and assume you get 450 miles to a 55 litre tank. Yup that's it, still only 37 mpg!
As a comparison. I've got a DSG A3 with the 140 2.0tdi. My computer tells me I achieve over 55mpg rain or shine, day in day out. Quite often motorway runs get me 60+, I've even had 80+mpg once (jesus though, that was a stressful game
)
BUT...My actual fuel consumption figures (54 litres used 500-600 miles per tank) demonstrate with cold hard facts that it's extremely rare my car ever averages over 50mpg...
Sorry for the rant, as I've just joined. But it's pet hate of mine. People claiming, nay - boasting amazing MPG figures, just by going off the cars internals readings. Especially as it can be misleading to people who are reading up about a new potentially expensive car purchase, with a heavy bias towards fuel consumption.
I'm not sure why this inaccuracy proliferates so much still. I suppose Audi certainly don't want people making too much of a fuss, as it puts the 3.0tdi even further behind the likes of the 330d. Which, from my research does in fact seem to be able to achieve a real world 40 mpg.
