European Fuel Costs
I can't speak for the rest of Europe but here in the UK at one of the cheaper petrol stations, we're paying 1.36 GBP (why isn't the English pound symbol recognised on this site?) per litre and that translates at the current GBP/$ exchange rate into $7.80 per US gallon. So that's why we (well some of us, anyway) are mpg aware! What I don't understand is that in the 60s, most American cars were huge gas guzzlers then came fuel awareness, probably caused by rising prices and many Americans started driving more economical vehicles; recently it's gone the other way with many people (and here in the UK) once again driving gas guzzlers in the shape of huge 4x4 SUVs. Why? (sorry but I don't have an answer).
I'm commenting on the USA because I'm replying to a USA commenter and I have a certain familiarity with the USA as I've been spending a month there every year since 1999.