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IS F (2008-2014) Discussion topics related to the IS F model

IS-F Gas Mileage?

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Old 03-21-13, 11:17 AM
  #61  
Juanca
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I don't know how you guys drive but before I/E/H I averaged 16 MPG on a 65/35 HWY/City mix, now after I/E/H I average 14 MPG.
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Old 03-21-13, 12:45 PM
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I'm about 22. I'm 80% highway driving and pretty aggressive....
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Old 03-21-13, 05:18 PM
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19mpg, 90% hwy, always in sport mode, and average 80mph on the road
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Old 03-21-13, 06:18 PM
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Gymkata
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37 mpg is the best I have done so far...oh wait, nevermind...that was in my 5000 lb SUV. My ISF now gets about 16 mpg with I/H/E and mostly backroad driving.
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Old 03-21-13, 10:25 PM
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about 18MPG, 70% HW, 30% City
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Old 03-22-13, 08:06 AM
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18mpg and im always late for work. 70 city 30 hwy. keep in mind the frist 3 miles rpm are under 3k and i use this as my daily.
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Old 03-22-13, 02:26 PM
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15-17 mpg
pretty much
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Old 03-23-13, 04:36 AM
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I just did a 2 hour trip on highway and got 8.6 litres per 100km which is approximately 33 mpg. I avtually took a picture with my phone as i couldn't believe it myself. Around town I average 12- 14 litres per 100 or 20-24 mpg. I only use 98 octane fuel which may help
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Old 03-23-13, 04:50 AM
  #69  
jkeifer3
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Originally Posted by Phresh2010
The isf get impressive gas mileage for a 5.0 liter displacement v8 engine, I've seen c350s, and a4 3.2s get either the same or worse gas milelage
C5 and C6 Vettes get quite a bit better gas mileage than my IS-F ever thought of getting.
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Old 03-23-13, 04:56 AM
  #70  
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Couldn't believe it myself

IS-F Gas Mileage?-image.jpeg
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Old 03-23-13, 06:53 AM
  #71  
djeuch
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Originally Posted by BULLIT
Couldn't believe it myself

Attachment 277070
That ends up being 27.7 MPG... Still good though!

Edit: imperial gallons would be 33... But I don't measure my MPG in imperial gallons.
Last edited by djeuch; 03-23-13 at 06:59 AM.
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Old 03-23-13, 07:06 AM
  #72  
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I get about 15-17 depending on how I'm driving, not very much highway in there (where I'm actually going the speed limit at least)
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Old 03-23-13, 10:40 AM
  #73  
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Originally Posted by jkeifer3
C5 and C6 Vettes get quite a bit better gas mileage than my IS-F ever thought of getting.
Smaller frontal area, similar Cd, and 500 lbs lighter do have their advantages. Not to mention the millions and millions of man-hours over decades put in the SBC's development and tuning.

My current mileage has gone to crap. I only drive about 3 miles and never get off cold cycle. I'm lucky to see 14 mpg. I'm also very concerned about my oil's service life with almost nothing but short trips - I'm pretty sure 12k OCI is a thing of the past unless my driving patterns change again.
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Old 03-23-13, 12:54 PM
  #74  
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90% Chicago streets 10% Highway. Since cities vary, I thought I'd be specific. City avg is 10 and highway avg is 20 with rush hour and 30 without rush hour. Don't want to calculate track avg.
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Old 03-23-13, 02:31 PM
  #75  
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Originally Posted by djeuch
That ends up being 27.7 MPG... Still good though!

Edit: imperial gallons would be 33... But I don't measure my MPG in imperial gallons.
Thanks for clarifying, i just used the converter on google.
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