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19mpg mixed driving on E85
 

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I'm convinced they are driving down hill all the time...

That said, filled by 12 ex sedan last week and it's back up to 23 mpg in town.
I mean I had a 99 civic hx that would get 45 if i kept it around 60mph, but there is no way in hell my si will get over 30mpg. At least not where I live, but i've even done road trips driving like a granny and still only average like 28.2
 

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that wasn't for the entire tank of fuel. it was the last 69 miles of the tank. that very well could have been down hill, down a mountain side or a long highway. the trip for A was reset....so, it's not a true and accurate reflection of what the tank of gas got.
 

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I just bought my 2015 honda civic lx sedan but previous owner listed as 24 mpg. I think she can can do better than that
 

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How on earth did you manage that? My si sits around 26.1 mpg.
Hypermiling. '12 is the lightest among 9th gen. 95% HWY. Mostly around 57-61 MPH although I went 70+ briefly a couple of times.

that wasn't for the entire tank of fuel. it was the last 69 miles of the tank. that very well could have been down hill, down a mountain side or a long highway. the trip for A was reset....so, it's not a true and accurate reflection of what the tank of gas got.
Correct, it was the last 69 miles of the tank and I reset trip A. Yes, mostly highway.

I checked the starting and ending elevation online and there's a 1400 ft net difference. Again correct, there's the down hill factor which is why I also added 46+ mpg going on the opposite direction. Therefore, the down hill factor is approximately 11 MPG better than going up hill; 57-46 = 11. The theoretical round trip would have been around 51.5 MPG; average of both directions.

Since you've mentioned tank of gas, my best one was around 40.x MPG hand calculated (iMid = 44-45 MPG).

Start: 1519.0 feet
End: 111.5 feet
 

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I just bought my 2015 honda civic lx sedan but previous owner listed as 24 mpg. I think she can can do better than that
Update for a couple weeks owning the car filled it with 91, shes getting around 30 mpg so I'm happy
 

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My fuel economy meter tells me I'm averaging about 7.4 L/100km. When I do the math manually on a tank of gas I'm getting about 475km/40L = 8.4L/100km.
 

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Agreed, I have a 2012 SI Sedan and I average about 28-30 mpg highway and roughly 18-22 city....plus I like to drive er a lil hard cuz why not XD but it does great. These cars have tiny fuel tanks though but still get some goo range with em.
 

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2014 Civic sedan LX almost all highway going 75mph in windy South Texas averaging 34-35 mpg. Not too bad if you ask me!
 

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'15 Si Coupe, currently getting about 27mpg with 50/50 city highway.
 
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2013 SI sedan, hps intake tube, kn filter, Q300 exhaust, reflash, I get about 29 mpg probably 60/40 city highway. Before the reflash I was getting like 25 mpg. Don't know if that has anything to do with it, or i'm driving slower these days.
 

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I just filled up this morning with 93 octane E10 on my 2014 FB6.
I averaged nearly 35MPG (34.9, to be exact).
Only mod is that I am tuned by Vit with Hondata. Well, and my 16" winter wheel/tire setup.
 

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I tend to use 91 or 93 interchangeably. Really its just what is available at the gas station when I stop. Anyway, I get roughly 18-20 in mostly city driving (woo D.C. traffic). On the highway on road trips I normally get about 32/33.
 
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Hasn't changed. Around 32 to 34 city and 40-43 highway. It hates gasoline!
 
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