oddly, for example, as above, yesterday, I achieve 3/4 of a tank for ktec and back, indicated 280 miles, roughly £10 = 100 miles.
today I do work and back, blackwall tunnel solid, there and back, 80 mile round trip, so theoretically, give or take, I should have used £10 max possibly less, right?
sitting in traffic, my car has used nearly half a tank today
I grant you this 80 miles over all probably took me 4.5 - 5 hours between morning and on the way home but still, it is using TWICE as much petrol to idle and stop start in (today) particularly bad traffic thru london
epic fail.