2012 2LT - Horrible gas mileage

[TJ91]

Originally Posted by Jalberdi99

1865

Seems unrealistic aka not possible but try driving the car hard and see if your mpg starts to go up. Your already getting horrible MPG so its worth a shot. I remember shifting at 2000rpm and got horrible milage, brought it up to 4000rpm for shift and my mpg went up. But I mean I drove it like I stole it afterwards, it probably helped break it in better.
Ill never do the the Owners Manual Break in ever again, only the hard break in.
Try it and let us know, but you could bring this to the dealer and see what they say.

Sorry dude but I know the feeling as ive been there before, hope it starts to improve

[Jalberdi99]

Originally Posted by TJ91

Seems unrealistic aka not possible but try driving the car hard and see if your mpg starts to go up. Your already getting horrible MPG so its worth a shot. I remember shifting at 2000rpm and got horrible milage, brought it up to 4000rpm for shift and my mpg went up. But I mean I drove it like I stole it afterwards, it probably helped break it in better.
Ill never do the the Owners Manual Break in ever again, only the hard break in.
Try it and let us know, but you could bring this to the dealer and see what they say.

Sorry dude but I know the feeling as ive been there before, hope it starts to improve

i guess i will get home in 10 min today when usually takes me 35 40 min.

[Lumix]

Originally Posted by DarkneSS

Add to that, the V6 just flat out doesn't get good mileage.

[Lumix]

Originally Posted by DarkneSS

If the V6 isnt on the highway, its going to get just about the same mileage as the 8.

Double

[KaBoom1701]

Take it in...there is an issue if it's that bad...

I just bought mine and it says 21.4 MPG...

[mr_honez]

Originally Posted by Jalberdi99

i guess i just have to wait. it did improve from 17.9 to 18.2 avrg

That's what I'm doing, and really all we can do is just wait and see if it gets better with mileage. I'm sure it will. If not- Well, we still have great looking and driving cars.

[Jalberdi99]

Originally Posted by KaBoom1701

Take it in...there is an issue if it's that bad...

I just bought mine and it says 21.4 MPG...

when i bought mine with 10 miles it said 20mpg and then it went dow hill to 17mpg and now 18.2mpg

[Jalberdi99]

Originally Posted by mr_honez

That's what I'm doing, and really all we can do is just wait and see if it gets better with mileage. I'm sure it will. If not- Well, we still have great looking and driving cars.

amen!!!

[rwmiller56]

Originally Posted by BreakingBad

Should I be resetting every time the car is off, or just upon refills?

You can reset the DIC at refills. There is no need to reset it each time you stop the car

I reset the DIC at every refill, and I check it against the manual calculation (miles driven divided by gallons filled), and the DIC consistently reads only about 0.3 MPG higher than the actual gas mileage calculation. This is because the DIC calculates mileage using a different algorithm (fuel flow). But it is still fairly accurate.

Check out http://mpgtune.com/
This is a good way to track your mileage.
My car's data: http://mpgtune.com/dashboard.php?carId=5852

About your problem:
Yes, the 11 MPG is too low. I have a 1LT V6, and I get about 18-19 city, and 28-29 highway. My work commute is 20% highway/80% city, and I usually get about 20 - 21 MPG.
So I would recommend that you bring it in. Be sure to have some hard data to show the dealer, that was taken over a few tank fulls of gas. For each tank, record your average speed (be sure to reset average speed and average MPG after you fill the tank).

You can get a rough estimate of your highway/city driving by:
% Highway = (average speed - 25), then divided by 35.
So, if your average speed if 50 MPH, your percentage of highway driving is:
(50 - 25) / 35 = 0.71 = 71%. City driving would be 29%.
This is assuming you don't drive too much over the speed limit on the highway

Good luck, and I hope you get the issue fixed.

Roger

[My Caroline]

Originally Posted by BreakingBad

GOOD info, Appreciate it! Will do for next fill up.

No problem! I remember when I was having similar worries.

Filled up just a bit ago, so perfect example.

I put about 15 gallons in last time and drove 275 miles, TODAY I put in ALMOST 15 gallons so I can assume I will be pretty close (but I will have actually gotten SLIGHTLY better than what I calculate because I didnt use the full 15).

275 miles divided by 15 gallons. Thats 18.33 MPG. We can assume its fairly spot on. While math shows I got 18 and 1/3 miles per gallon, the DIC was displaying a rediculously low 13mpg. The DIC can be decieving because if you floor it, its averaging 2mpg with whatever else you're getting, dragging down the average more that it really should.

SOO nothing to worry about, and 18MPG is pretty good considering I do mostly city driving during the week.

[Angrybird 12]

Originally Posted by My Caroline

You need not pay attention to the DIC. It averages the 1 second you floored with with the 30 minutes your crused. What you REALLY need to do is take your gas receipts and calculate the average on your own. The DIC doesn't run for the whole tank, and it doesn't even run after you've turned off the car. Not only do you need to reset it every time you fill up, you need to reset it every time you turn the car off.
Notice how your average speed is probably like 30mph. If you only did that and went to the donut shop. Got back in your car and hoped on the highway for 4 hours, it wouldn't be a 30mph average. It was 30 because that's what it was when you turned the car off.

From your last fill up take your receipt. Take the number of miles you drove on that tank and divide by the number of gallons you put in. It's usually different than the DIC.

It has to take the one second you floored it into the calculation along with the 30 minutes you cruise because its an overall average... Sure the DIC readout will be different if you reset it every time you shut the car off. If you want a good average mpg you have to only reset it at fill up. If you don't reset it between fill ups it DOES run for the whole tank. Every time you reset it between fill ups it screws up the entire calculation.

Originally Posted by My Caroline

No problem! I remember when I was having similar worries.

Filled up just a bit ago, so perfect example.

I put about 15 gallons in last time and drove 275 miles, TODAY I put in ALMOST 15 gallons so I can assume I will be pretty close (but I will have actually gotten SLIGHTLY better than what I calculate because I didnt use the full 15).

275 miles divided by 15 gallons. Thats 18.33 MPG. We can assume its fairly spot on. While math shows I got 18 and 1/3 miles per gallon, the DIC was displaying a rediculously low 13mpg. The DIC can be decieving because if you floor it, its averaging 2mpg with whatever else you're getting, dragging down the average more that it really should.

SOO nothing to worry about, and 18MPG is pretty good considering I do mostly city driving during the week.

Did you reset the DIC any other time than when you filled up your car? If you did you screwed up the DIC's ability to show your true MPG for that tank. Again It has to take that 2mpg in account because you are using that much fuel that's why it's called an AVERAGE MPG.
I have owned many cars with the average MPG readouts and have never found one to be more than 1/2 mpg off for a tank of gas.

[Stud]

I get 16.5, 100% city. Moderate to heavy foot.

[sspolo]

Maybe the computer is messed up, have you tried manually getting an average?
Other than that, good luck!

[Austin45]

I drive very inefficiently and I'm averaging 20mpg in the city...