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Chevrolet Impala Real World MPG

123 messages,  Last post on Apr 21, 2011 at 11:06 PM

You are in the Chevrolet Impala Forum.

What is this discussion about? Chevrolet Impala, Fuel Efficiency (MPG), Sedan

Messages Page 7 of 13

#59 of 123 recent rental MPG by mtpete

Jun 27, 2007 (8:49 am)

1600 mile round trip, 2007 Impala, 3.5 engine.
 
Returned 32-34 mpg per tank. Best tank, 640 miles. Kept speeds at posted limits of 65/75 mph, moderate acceleration, full use of cruise control.
 
Impressed with smooth powertrain, and, amazingly, comfort... no back pain after a 14 hour drive!
 
Now if they'd just tighten up that suspension. Not confidence inspiring at highway speeds.
 
And where's that new 2.9 diesel V6?
 
This is excellent mpg for a car of this size. Chevrolet is so very close to earning my business.

#60 of 123 2006 Impala w/3.5 @ 9,800K Miles by lightning23

Jul 02, 2007 (9:19 am)

Freeway driving: Cruise set 70 MPH yields 32.5MPG. Results are even better in the 60 to 65 MPH range - anywhere from 34ish to as high as 37/38 MPG.
 
In town: driven primarily for short distances of 1-4 miles = 22MPG average.
 
As the previous poster stated: smooth powertrain and comfortable ride. We are very satisfied with the vehicle. Best car we've owned, as of yet!

#61 of 123 Mileage... by ryster

Jul 04, 2007 (10:06 am)

'06 Impala, 2LT, 3.5L V6. 11 months and 14,000 miles "old".
 
Average 21mpg most tanks. Car is a daily driver during the week, around 60 miles per day. Mixed commute, some steady 55mph driving, some stop and go, some 35-45 suburban driving. Lots of hills.
 
I have been "experimenting" recently and driving VERY conservatively. Very gradual acceleration, no mashing the gas, etc. So far this tank I am averaging 23. So I gain 2mpg if I drive like this. Without all of the hills I could probably get up to 25mpg overall.
 
The car has never really been on a 100% highway trip for a full tank. I did do a 100 mile round-trip highway run several months ago, and saw about 26mpg for that 100 miles.
 
All in all, a very economical car compared to my previous V8 SUV. My monthly fuel bill has almost been cut in half since I bought the Impala

#62 of 123 2006 LTZ Mileage by deminin

Jul 08, 2007 (12:05 pm)

We've had our 2006 LTZ, with the 3.9L V6 for about 22 months now, and it has been flawless. We recently drove out to Las Vegas from central Missouri, and on the way back I tracked the mileage. I zero'd everything out when we left Las Vegas, and stopped checking at Springfield, Missouri. Running on I-40 and I-44 at 75 to 80 miles per hour with the AC running, I got 30.1 MPG during that 1200 mile stretch. Needless to say, I was impressed. On a daily average, mostly 2 lane country roads, we get between 26 and 28, which for a car of this size still isn't too bad.

#63 of 123 2007 Impala SS Mpg by slvimpala

Jul 29, 2007 (11:22 pm)

Replying to: deminin (Jul 08, 2007 12:05 pm)
i put in that tornado thing and the Fram Air Hog Air filter and boy it makes hell of a Difference i mean b4 i installed em i was getting around 22-25 thats all city and now I'm getting since i put it in was highest 32 and lowest 28 so it may set you back $120 but it will pay for its self in the longer run i will keep all up to date on when i get to working on the Spark Plugs and etc

#64 of 123 Re: 2007 Impala SS Mpg [slvimpala] by pulgo

Jul 30, 2007 (8:04 am)

Replying to: slvimpala (Jul 29, 2007 11:22 pm)
The "tornado" thing is just a scam.

#65 of 123 Re: 2007 Impala SS Mpg [pulgo] by nosirrahg

Jul 30, 2007 (8:56 am)

Replying to: pulgo (Jul 30, 2007 8:04 am)
I also made the mistake of purchasing a set of "halo" spark plugs that were supposed to increase gas mileage 10%. After initially installing them on my 2000 Impala I started having problems with the car missing when lugging the engine (as in going uphill at low speeds with the AC on, just before the car would downshift). I subsequently replaced the plug wires (which I had not done previously), and in the process found the shafts on several of the plugs that the wires snap onto were loose (they sort of thread onto the ceramic portion of the plugs).
 
So the combination of tightening the plug shafts and replacing the wires solved the problem...for about a month. The problem surfaced again yesterday, so I'll drive it for a little while to see if it consistent, and then pull the plug wires and see if those shafts had worked loose again, or if there's something else going on. While beyond that these spark plugs seem to work okay, they've had no impact on my gas mileage at all (positively or negatively). I would have expected an increase had I replaced them originally with standard plugs, so I was disappointed that I saw no increase with the new plugs.
 
If I find the shafts are loose again I'll tighten them again, but if the problem continues to come up I'm yanking them out and will probably put a set of Bosch plugs in there and not worry about it again.

#66 of 123 2006 Impala w/3.5 @ 37,800K Miles by joeboston

Aug 13, 2007 (10:19 am)

I just started driving this car to work everyday. It was my wifes car but she now drives the SAAB 95. My plan is to start documenting the MPG as I try different ideas to improve it.
 
So far I have only adjusted the tire pressure to 44 psi (This is the max for the stock tires). My daily drive is from Ortonville, Mi to Detroit, MI (RenCen). This takes me on county roads and I75 (Parking lot).
 
I am just starting the log which I will base all of my future results on. The results to date are using the on board computer.
 
Drove from Ortonville, Mi to Frankenmuth, MI., I75 with the cruise set on 72 MPH with the A/C on. We had 2 adults and one 4 year old in the car. We averaged 36 MPG on the way there and 33 MPG on the way back (Ran into construction backups on a Sunday afternoon heading south).
 
The week of 7 August driving to work and back home averaged 26 MPG. This was combined county Road driving and I75 (Rush hour traffic).
 
Today (13 Aug 07) I drove in at 8 AM (Much less traffic). I reset the on board computer after entering I75 (Great Lakes Crossing Exit). Set the cruise on 74 MPH, without A/C and one adult in the car. The traffic was so light I was able to maintain a constant speed all the way downtown. As I exited I75 onto I375 (detroit) the on board computer indicated 40.4 MPG.
 
Future improvements:
Replacing the stock air filter with a new K&N filter. On order, waiting for delivery.
On the next oil change I will be using Mobile Full Sytn 5-30
Replacing the spark plugs with Bosch Iridium Fusion plugs.
Replacing the stock tires with ones that can hadle at least 45 PSI.
 
I plan to do each one on seperate tanks of gas and measure the entire tank along with the on board computer for results.
 
I am very interested in your comments and suggestions. I have played around with small onboard hydrogen units in the past with good results. This unit may find a place in this effort as well.
 
Thanks
Joe

#67 of 123 Re: 2006 Impala w/3.5 @ 37,800K Miles [joeboston] by pulgo

Aug 13, 2007 (10:37 am)

Replying to: joeboston (Aug 13, 2007 10:19 am)
To measure your gas consumption I would not rely on the computer.
 
Just fill up, reset the trip meter to zero.
 
Next time, do the same again and divide the gallons printed on your receipt by the miles shown on the trip meter. Reset trip meter.
 
Repeat this procedure for at least 3 tankfuls and you will have a fairly accurate MPG figure.

#68 of 123 Re: 2006 Impala w/3.5 @ 37,800K Miles [pulgo] by quietpro

Aug 15, 2007 (7:39 pm)

Replying to: pulgo (Aug 13, 2007 10:37 am)
If you want to be sure of your consistency, fill up at the same station using the same pump to eliminate calibration errors at the pump. There have been many reports (at least in my area) of pumps that have been intentionally tampered with to overstate the amount of fuel pumped.

Messages Page 7 of 13

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