Hi Kelshouse,
I own a 2019 IS 350 F sport and get around 9 l/100kms on average. I live in inner Sydney and so I don’t use it as a commuter hack, mostly to visit relos out at Penrith and down the south coast where I love the overtaking power. Since I don’t need to commute I’m not worried about fuel economy. In reality this beautiful car is wasted on me as I don’t use a fraction of its power and handling potential but it’s sooo luxurious, punchy and fun to drive (do I sound like a commercial for Lexus? Sorry!). I wouldn’t think of towing with my car - that’s what SUVs are for.
Hope my rant hasn’t put you to sleep. 🙂