We've had our LR w/ 20" 3 weeks, average is 312 watt/mi and we're not really pushing it much. We do live on a hill, and certainly that doesn't help. Even excluding the hill to our home, we are seeing high 200's watt/mi.
As far as range, have ready many posts and articles (and fleet data off 3rd party apps) and the reality is that only in very optimal conditions can this vehicle get 300+ miles...316 is not going to happen in normal conditions (65-70 mph with A/C on, you know, typical road trip). Looks like 250-275 miles on a typical road trip is probably as good as it'll get (esp w/o getting to low single digit % remaining at end). This 250-275 is consistent with the UK ratings per the earlier post (good stuff, thanks for sharing that). I was blown away to read the EPA highway test is done at average speed of 48 MPH with max 60 (and no A/C)...that's not reality for most highway driving...and very misleading.
EPA ratings totally misrepresent the range the true range to consumers. Buyers need to be aware. I wasn't. But it's still a great car.