Yes, most all of the 2013 MKZ's on Fuelly.com are Hybrid Owners reporting on there. I think there is like one 2.0L Ecoboost owner and one V6 owner reporting on there. The rest are Hybrid owners and that is what is driving the number so high. Though I feel that those Hybrid owners are more of the fuel conscious "hyper-miler" type of folk - hence they're reporting their mileage results regularly using Fuelly. If I had a Hybrid and was driving it the way I normally drive, then my numbers would be MUCH lower than the 40's.