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Question for you. A friend has a '12 GS and her gas mileage has been in the teens for quite some time now. I'm wondering if the temp settings in this pic might affect it. I know on older cars, having the temp specified could cause the compressor to cycle on/off but I'm not sure on C6's. In contrast, my 07 gets mid 20's for mileage but then again I never use the temp settings. What are your thoughts?
And yes, I know Corvettes aren't bought strictly for gas mileage. I'm just asking for a friend.
1). Old fuel from last summer
2). Oxygen senors, time for replacement
3). Engine driven gently could carbon up ]
4). Gas fouled plugs, vehicle gas flooded at one time
5). Air Filter plugged with leaves/dirt
AC settings aren't going to affect fuel mileage if that's what you're asking. Anytime the AC is on (which it always is unless you turn it off) it will cycle the compressor on/off.. that is totally normal
I've gotten 22-23 mpg on a supercharged 2005... what kind of driving is he doing?
Last edited by schpenxel; Apr 25, 2016 at 06:33 PM.
MPG in the teens is not appropriate unless the car is on the road course for ½ of the tank. As Cmy Six mentioned, is this reading coming from the Dic or actual calculated mileage?
The car is not tuned for and running E85 is it?
I happened to type this up in another thread today:
Originally Posted by Joe_G
Holy smokes... 11 mpg indicates something is wrong to me - you might want to look into that.
Here is the basis for my comment:
I have recorded every gallon of gas put in my car since I obtained 10 years ago. I have 497 drag strip passes, heads and cam and 4.10 gears and my average lifetime mileage, primarily from daily driving here in S. Fla traffic (80,189 miles currently), is 18.97 MPG.
My lowest tank was 8.37, a tank I ran 100% on the Sebring track.
My highest tank was 21.92, which was bone stock, and that tank included 8 drag strip passes. It wasn't long before I installed 3.90 gears and headers which dropped avg mileage to 19.37.
Average mileage with the G5x3 cam on top of headers and gears was 18.14.
Average mileage since I installed AFR heads improved 18.70, but it should be noted that I stopped daily driving the car 3 years ago, 6 months after I installed the heads, when I obtained a Prius. The 18.70 average is only over 5,178 miles and is mostly cruising to car shows and the track, with only a handful of drag strip passes.
By the way I've recorded 49.74 lifetime mileage in the Prius over 41,676 miles plus free rides in the I95 Express Lanes which can cost up to $12 one way to downtown Miami). As you can see, when gas was $4.30 a gallon the Prius was an amazing money saver.
My dear friend was one of the lead techs at Vista BMW near you (coincidentally he gave me the AFR heads and we did the swap in my driveway); he also warned me against getting a BMW that was out of warranty! And believe me, he knew!
Thank you for your kind comment, yes, I do track things as you can see and make every attempt to base my comments on experience or reasoned research. I'm not always perfect of course!
If you're really only getting 11 mpg your car must be leaking fuel, I'd seriously look into that.
Gas mileage question
