[DavySNP1242]

I,ve owned a '97' S40 1.8S for two years now, covered 14k miles in that time, mainly urban commuting with roughly monthly 320 mile round trips between Central Scotland and South Cumbria.
I,ve always kept a note of my fuel usage and I get 29.5 mpg urban and 34.5 on the long runs (at a steady 70 mph).
I,ve done the Cumbria run both ways with and without cruise control and can confirm that cruise uses more fuel (31.5 mpg).
To see this put the computer into instant consumption whilst driving in cruise and then without cruise and see how often the mpg takes a dive when the cruise is on compared to when it's off.
Fuel consumption is also dependant on how you drive, some drivers can get double the miles of others. (Going down Beatock and Shap in neutral saves a fair bit, (old lorry drivers trick).