I'm just saying my rough estimate for non-hybrid cars is that I can exceed the manufacturers claimed MPG figures by about 20%. Not so with hybrids. Maybe I can squeeze out another 4% or so without any drastic changes in driving speed, but hybrids just don't leave much on the table short of aerodynamic improvements.
I certainly wouldn't set my expectation based on best case scenario conditions in the summer. What is relevant is average MPG over time.
Getting much over 40 MPG on a regular basis on anything resembling a box seems unrealistic to me. I'm getting 29 MPG in my 2017 CX-5.
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