I am new to the Owners Club and came on here to find out if I was alone. There are so many posting "I regularly get 60mpg" or "even pushing the car I never get less than 50mpg" or "I have done 700 miles from new and averaged 55mpg in my F-Sport" that I was starting to think that my car (Executive edition with upgraded 18" F-Sport alloys) has a problem! Relieved in a way to see the posts above (because it means that my car is normal) but must say I am surprised and a touch disappointed with the economy.
I have done just 400 miles in 4 weeks since new. Hardly anything I know! Yes it has been cold (average 5 degrees Celcius, heaters and heated driver seat on), yes my journeys are mainly to and from the station (3 miles, 10 minutes, up and down quite steep hill) but I am getting 30 mpg to the station and 25mpg home. I am driving like Miss Daisy, trying to hit the sweet spot as much as I can! On a bit more of a run I got 42mpg and doing 50 motorway miles today at 70mph (cruise control) I got 45mpg. Overall a disappointing 33.5mpg from new. The dealer says the engine will loosen up at around 8000 miles :-):-)
Initially I had the car in Eco mode, but Normal is better as it gives better torque and gets you up to speed (where you can tickle accelerator to maintain speed) more quickly.
That said I love the car to bits, and that is coming from an Audi S5 Quattro 3.0 supercharged where I averaged 24 mpg over 3 years of ownership and typically 25mpg to the station and 18mpg home. The IS is a totally different drive, more relaxed but just as much fun trying to improve my fuel consumption! Sounds like a gripe but not really, I just wish there was more "real world truth" in the Department of Transport published figures (no blame to Lexus).
Would appreciate any thoughts, but it sounds like I am not in as much a minority as I thought I was!