I recently bought a 2019 CX-5 GT-R. I have a 60 mile commute, all highway, cruise set at 75 mph. I bought this as a comprise between fuel efficiency and power (turbo). I have been astonished by how bad the gas mileage is 20 - 23 highway. I can't stop looking at the tach which shows over 2500 rpm at 75 mph. It's like it needs another gear or two. I feel this is why it gets such poor highway mileage. Also, this could not be good for the longevity of the engine. Thought? I'm about ready to get rid of it after less than a month. Most uncomfortable seats I've ever experienced in a car but that's another story.