Normally I get around 34mpg.
You really need to use cruise control to achieve the best fuel consumption. If you use the throttle manually even a 1-2mph increase in speed dramatically impacts your instantaneous consumption. Another trick you can use when on hilly dual carriageways is to stick the car in neutral when going downhill (I believe the car will use less fuel gathering speed going downhill in neutral than it would in gear with gentle acceleration), use this momentum for the first part of going up the next hill, and engage 6th gear and cruise control (at 53mph for me) just as you are about to go below 53mph.
I'm now on a mission to get the highest instantaneous fuel consumption. Is less than 5mpg achieveable? - perhaps uphill in 2nd/3rd gear full throttle?
