Me too. I think Ive done well to be averaging 24. 
After driving back today in stop start traffic I'm back down to 28 mpg 
Either it's not a real 3.2 or you aren't driving it properly 
Definately a 3.2

I have points on my licence.

My commute on a Monday is 95 Miles which is 1 mile to the Local Bypass, 5 miles to M57, then M62, and M6 to Wolverhampton, just about 1/2 mile from Junction 2 of M54. So 85 miles of motorway, 5 Miles of Dual Carriage way 4.5 miles of 50 mph A road, and 1/2 mile of 20 mph limit. (Which is the 1st 1/2 mile and I achieve about 13 mpg when the car is cold.
There is nowhere, apart from in the 1st 7 miles, when you can get (safely) over the speed limit. I just put it into cruise at a true 70, (or 50 in the Road works on the M6,) and watch the range increase. Most times the range is higher when I arrive than when I left home.
I have watched the instantaneous fuel consumption in the 50 limit and it hovers around 40-43 mpg.