The 07 Civics are rated 30 city and 40 highway. Realistically, I would expect to get about 27 and 34-35. Still pretty good. You really need to use the stickers as a way to measure one car against another and not as the actual expected gas mileage.Of course, your real world mpg can really vary demanding on where and how you drive.You could easily get in the low 20's if you drive it like a performance car - but that is with any vehicle.