Reply on G8 V6 .. One the gas mileage on the open road level is a real 24 MPG. The right front seat is really cramped because it was designed not to go back to create more leg room in the rear seats. No tall person over 5' 10″ can sit their in comfort.
Best handling car I ever had, nice back seats, trunk has no cover on deck lid and you will cut your hand if you reach up and start the close from the inside. Typical with problems GM has a standard answer if something does not work, it meet their specs.
Brent