[elhigh]

Hi,
You called it: motorway = freeway in US, also called "Interstate Highway" by the pedantics.

Are your fuel log reports for propane or gasoline? I see one entry that calls out running on gas but most of them don't do that.

I'll second Joris' statement, that engine is nice but not widely regarded as a penny pincher. What you have there is pretty serious power for shoving an upscale compact executive saloon down the road at a good clip, NOT the usual paradigm for a highly economical car. I don't doubt you can improve upon it (though the other statement that Volvo has done a lot of good aero design on this machine is also very true), but the threshold will be a bit higher to start.