My mileage, as indicated by the onboard computer, has varied from 41 to 38 mpg over 3 years of ownership. Understanding that the computer issues educated guesses and that my driving routine seldom varies, I imagine the difference is in the fuel formulation, but I'm not getting gray hair over that.......wait.... that's the only hair I already have!

 

After 4 1/2 yrs., my trusty GK LX 6-speed just putters along with a 36+ mpg. (combined) at 35k. Certainly beats my previous 1st gen (LX auto) back on the islands. That puppy averaged 28mpg w/ 135k.
Enjoying the stickshift immensely. When my son's are home for the holidays they love taking the Fit over my wife's truck cause it's a no brainer to park.
Fair to note that my most economical highway speed is between 55-60 mph. I can get as high as 48mpg. Going 70mph+ brings that down to as low as 34mpg.

 

Well in Oregon, topping of the gasoline IS against the law, even if it is rarely/ almost never enforced. From what I've read, topping off can also make your account of gasoline used wrong, because with pumps that have a vapor recovery system, the pump will feed back gasoline to prevent vapors from escaping into the environment. So you can indeed be paying for gasoline you aren't really getting. Not to mention any possible damage done to your own emission system if you overfill. IMO topping off is not a good idea.

Oregon is not self serve. I'm usually at the mercy of the attendant. But I routinely ask they do NOT top off. I'm routinely disappointed in how many times they DO top off.

 

If you look author the fuel tank on the fit is plumbed,, the hose is almost 5 feet long to get to the tank from the filler.
Mine from the factory is clear and if you play around with it there is up to 3 gallons of slop on when the nozzles trip off.

I insist on a top off on my jeep (I live in Oregon) , it has an 18 gallon tank and ALWAYS trips at 12 to 13 level from empty,
restart and it takes 4 to 5 more gallons. On the other hand I've had pumps that don't even slow down and pump till you get the
fountain of fuel out the back. Thats why in many states, its illegal to leave the nozzle unattended (Not enforced obviously)
while fuel is dispensing.

The feedback on the pump system is vapor only ,, when it senses liquid full the pump will stop, it
doesn't keep spinning the fuel trough and counting it.. (I used to repair them.. .)

 

Not according to the infallible internet which says:

"once the gas tank is full — will feed gas vapors AND GASOLINE from the pump back into the station's tank to prevent vapors from escaping into the environment."

Also, it makes sense that the pump keeps pumping gasoline. Basically, if you are topping off, the pump has ALREADY sensed the the tank is full. By continuing to squeeze the trigger you are forcing the pump to continue to run.

I have read similar statements about the Honda Fits gas tank set up and the long filler hose. Which is why I don't freak out too much if the attendant tops off. BUT...I still don't top off, and I prefer that it doesn't happen. To me there is little advantage to topping off, and too much unnecessary risk.

 

Here in San Francisco with the hills and stop and go traffic, I'm lucky if I can break 17mpg in the city. On the freeway, things are much better and I often get over 40mpg if I'm driving at a reasonable speed. But since I mostly drive in the city, the meh city milage drags my average way down.

You guys getting over 35mpg - what kind of road and traffic conditions are you driving in to consistently get such good mileage?

 

I'm in the DC Metro area so we can see some traffic. What helps me is I live in a rural area so I'm not in city traffic until the last 5 miles of a 40+ mile commute. I leave at 6 am so traffic is lighter and I found that taking back roads can be better than the highway as I can at least be constantly moving versus doing a lot of stop and go traffic. We've got a lot of rolling hills so I use them to my advantage. There is at least 2 areas where I have a long downhill with a stop light. I use DFCO (Deceleration Fuel Cut Off) to my advantage. I will coast down those hills while not using any gas to idle the engine and sometimes I can time the light where I'm still moving when it turns green versus coming to a stop. You can see DFCO working when you coast you can see the MPG meter above the gas gauge shoot up to 90 MPG. If you look at traffic ahead, you can sometimes preemptively slow down (not even step on brake, just let off the gas) so that you keep moving versus having to stop or brake a lot, then have to accelerate back to speed. Also helps not to tailgate the car in front. If you leave a good enough gap you can modulate your speed with just the gas and not have to keep tapping the brake since the car in front is slowing. Every time you tap on the brake, you're just trading the gas you used to get up to speed for heat when the brake pad hits the brake disc. Tires to 35 PSI. Progress RSB has helped not having to brake to navigate corners so I can maintain momentum. Those are a couple of the "hyper-miling" techniques I employ.

 

in my 17' 6 speed i average around 32mpg.
this is with a good mix of city/highway and with a pretty heavy foot.
i also shift pretty late most of the time

 

As indicated by the variety of reports, mpg isn't very meaningful in most cases. Any gas powered car is going to get 0 mpg when sitting at a red light so things such as "city mileage" don't mean much unless put in context which then becomes bewildering given the differences between cities.

I do know I have seen 54mph on the on-board computer at the end of a 250 mile trip over slightly hilly terrain with a couple of hundred feet elevation change and I kept the speed 55-60mph. Not unusual to see 50+ on the same trip at other times. Increase that to 70 mph for about 200 of those miles and it drops to about 48 mpg. Summertime driving but no AC running.

I compared our on-board computer mpg to what I calculated from miles/number gallons at the pump and it matched to about 1 mpg.

It also helps to mention the Fit specification. This was our 2016 Fit with CVT which was supposed to be the best model for fuel consumption.