Looks like most here are getting mid 30s to around 40 MPG with the Fusion Hybrid. With a bit more aggressive hypermiling you should get mid 40's to around 50 MPG.

Give it a tank or 2 & concentrate on manipulating the car to maximize MPG's. Learning how to coast is vital to getting higher numbers.

Ok, that's pretty darned cool.

Unfortunately the devil's in the details...
Great for folks where it IS available though.

Also:

Maybe 130 - 150 MPG is a tad optimistic, official figures often are, but I think 100 MPG is easily achevieable, there are normal non-hybrid diesels on offer from Volvo currently on sale that get close to 90 MPG.

The actual mileage also depends a lot on your driving habits. The Fusion hybrid has a lot of customizeable screens that give useful feedback regarding fuel economy.
I have a Ford C-Max Energi and get 42 to 45 MPG in Hybrid mode even with a lot of highway driving. The dashboard MPG readout is about 2 MPG higher than it actually is. You can track the dashboard readouts in the comments for every fuel up.
Hope this helps.

Our 2014 Civic Hybrid understates the actual MPG by about 3. It consistently reads 41-43 while we've calculated 45.6. I wonder if Honda made a decision to be very conservative about it.

Hi, here is a link for US Ford Hybrids; Ford has finally decided to accept that their Hybrids fuel consumptions is totally different than advertised.
Read article...https://www.greencarreports.com/news/...open-questions

I agree that some gas sold at the cheapie gas stations affects mileage. I immediately see a 5% drop in mileage between the cheap gas stations vs a name brand like Chevron. Unfortunately, all gas in my area is 10% Ethanol, which drops 4 mpg off my car.
Everyone has a different commute, yours may be one that is not advantageous to mpg. My old residence allowed me to get 75mpg avg in my car, now that I live in a different area I average low 60's, nothing else changed but the route I have to take to work now.

My brother has a 2014 Fusion as well and he averages around 40 mpg per fillup. He lives in hills, so I'm sure that has an affect, but seeing as how Ford was penalized for overstating it's hybrid gas mileage in advertising, he takes what he gets as acceptable. The other option is to drive a Ford F150 pickup truck.
I've notice that most in-car computer readouts are optimistic in their MPG readings. My Mazda product is consistently displaying 10% higher MPG than what I calculate at each fillup. My long gone VW also consistently reported 10% higher than what I would calculate after fillups. My wife's Accord Hybrid (2015) is the one exception. After 3 fillups, the car computer is reporting just about what is calculated. I just filled it up this morning and the car reported 46.3 MPG while the calculated MPG was 46.2. The other fillups were just as close, differing by only a tenth of a mile per gallon or so. I think that is pretty incredible. Most of the drive is flat city, to & from work, with the occasional freeway trip on weekends. If you really want to get a more accurate reading in your Fusion, think about getting a Scangauge II (maybe version III by now). I have it in my car (Mazda) and it can be calibrated at every fillup. The sad part is that it shows a lower MPG than the car computer, but the truth always hurts.

Yeah, Hondas seem to be pretty close with their estimates... I've heard that from several folks.

My 2011 Prius averages about 2.5 mpg less than indicated. Our CRV is usually within 0.1 mpg of that indicated. Having another data field for indicated mpg is a good idea.