What is your Civic SI's best MPG?

Javier Chavez

Javier Chavez

Active Member
95
27
Santa Rosa CA
Vehicle Model
Civic SI
Body Style
Sedan
Just got back from a 800 plus mile road trip and this was the best I could do. My avg for the trip was around 35 which I am very happy with. I still need to do my first oil change Which I think should increase it a little.
 

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Brooksie365

Brooksie365

Well-Known Member
820
570
Worcester, Ma
Vehicle Model
Civic Si
Body Style
Sedan
have you guys done out the math to see how accurate the imid is? my imid was showing 32.7 mpg but the math said 29.9 i was surprised how off it was.
 
Flippercon

Flippercon

Well-Known Member
1,697
1,184
Virginia Beach, VA
Vehicle Model
Civic Si
Body Style
Coupe
IMAG0082_BURST007.jpg

The best so far. I have not took a long trip at highway speeds , this is about 50/50 going easy during acceleration. Most of the time I am lucky to get 25mpg. This should get better as the warmer months come. I also usually shift around 4-4.5K(except 3rd I just love running it to about 6ish) and vtec daily. Going in today for A1 service
 
Last edited:
323

323

Modifier
5,252
3,682
Chicago
Vehicle Model
Civic Si
Body Style
Sedan
Brooksie365 said:
have you guys done out the math to see how accurate the imid is? my imid was showing 32.7 mpg but the math said 29.9 i was surprised how off it was.
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Mine has been way off ever since I got tuned. The imid will say 19 when I'm really getting 26, or it will say 28 when I'm getting 38 (highway)
My highest has been about 38, and in the city about 26 is my average, 28 tops
 
DMS24

DMS24

Well-Known Member
129
61
Nevada, USA
Vehicle Model
EX
Body Style
Sedan
From my experience the iMID doesn't consider MPG for the current tank, it only considers that if you were to drive at the current rate, how much gas it consumes as MPGs.
 
808rallyred

808rallyred

Well-Known Member
282
387
Big Island,HI
Vehicle Model
si
Body Style
sedan
Yeah I just put gas and drove down hill with no throttle just was rolling but as soon as I got to the intersection and pop vtec Millage went straight down lol
 
T

tacthecat

Well-Known Member
212
80
Cheshire, MA - USA
Vehicle Model
2012 Si
Body Style
Sedan
Brooksie365 said:
have you guys done out the math to see how accurate the imid is? my imid was showing 32.7 mpg but the math said 29.9 i was surprised how off it was.
Click to expand...
Our Si sedan averages about 6% high.
Our best (full tank) run was 35.6mpg actual @ 65mph on Interstate. Have seen as high as 47mpg (on IMID display) on a 50 mile casual ride on hilly backroads - I was impressed but kept it under 55mph.
Worse, after break-in 29.7mpg at +9 to 79mph on Hiway/Interstate from Daytona to Mobile in mid-March.
At 11,245 miles we're averaging 32.11mph 33 on highway, 31 in "city" (we live in rural Western MA town).
 
Monk

Monk

Well-Known Member
4,218
2,196
SW Virginia
Vehicle Model
2012 Civic EX
Body Style
Coupe FG3:ASM
The mpg is adjustable through imid , look in the owners manual....... I have mine adjusted to where it's only by 2 to 3 tenths of a mile from my cell phone calculator.
 
FooBird

FooBird

If the Foo...well, you know. Just wear it.
6,152
4,715
Kirkland, WA
Vehicle Model
Si
Body Style
Coupe
35 mpg on a trip a while back from Seattle to Redding, CA. But...right now...I'm hovering somewhere in the 37ish range about 180 miles into the tank. This was from last night and 120 miles on the tank.

 
Monk

Monk

Well-Known Member
4,218
2,196
SW Virginia
Vehicle Model
2012 Civic EX
Body Style
Coupe FG3:ASM
Monk said:
The mpg is adjustable through imid , look in the owners manual....... I have mine adjusted to where it's only by 2 to 3 tenths of a mile from my cell phone calculator.
Click to expand...
CORRECTION : My mpg isn't adjustable .... it's my ambient temp. that's adjustable.......... but my mpg is usually only off by 2 to 3 tenths......
 
squiggy

squiggy

Cartographer
Super Mod
11,183
6,654
Michiana
Vehicle Model
'12 Civic Si
Body Style
DBP II Coupe
Danny Lugo said:
WHAAAAAAAAAT My si gives me about 23.9 MPG how do you get 35????
Click to expand...

I have gotten upwards of 40 out of mine fully bolted and tuned. Of course that was before a 245 wide tire. Now I average between 28/32 and can get upwards of 36/37 on highway trips.
 
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