Noticed the fuel economy on a Touring sedan was 2 mpg city lower and 4 mpg highway lower than the EX sedan due from the wheels. This could be seen between the LX and Sport too. The Sport with wider and larger wheels is 1 mpg less city and 3 mpg less highway. The difference is smaller between the LX and Sport because the LX has 1” smaller steel wheels that probably weigh similar to the Sport wheels whereas the EX has 1” smaller alloy wheel that probably weigh less than the Touring wheels. After more research I also discovered 10G Touring Civics with the 1.5 Turbo and 17” wheels had better acceleration numbers than 11G Touring Civics with the 1.5 Turbo and 18” wheels. Drives me crazy that manufacturers go with larger wheels for aesthetics and fad. I believe larger wheels should only be used for brake caliper or rotor clearance. Maybe we should be paying more attention to unsprung weight for better performance and handling. The easiest way to make a car quicker is to lose weight and mass.