Originally I was skeptical of fuel efficiency claims... however I am pleasantly surprised of the 1 MPG (or so) of improved gas mileage of combined Highway and City driving. Compared to the OEM Goodyear Fortera's, these Ecopia tires are outstanding. Very low road noise, significantly improved traction and handling (both dry and wet), and very good steering responsiveness. These tires have a very soft compound, I am interested to see how long they will last but the 65,000 mile warranty suggests they are designed to last. Overall outstanding tire so far, very pleased.