I should probably add that its 23mpg doing around 60mph. I'll be doing an 800mile motorway trip soon. I'll definitely be calculating how the efficiency fares at 70mph.
Thanks! It's got 57000 miles on the clock, 1 previous owner, always ran on fully synthetic oil (Not 100% synthetic, there is a technical difference believe it or not). Previous owner was an old man who'd just use it as a shopping cart.
23mpg
I get a reliable 23mpg, drops to around 19 in town driving . I don't even feel like I'm bragging because petrol here (Scotland) costs equivalent of $6 per gallon.