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Chevrolet Impala Real World MPG

117 messages,  Last post on Apr 15, 2009 at 11:28 AM

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

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#21 of 117 Re: '06 SS mileage [brittany232] by quietpro May 15, 2006 (1:59 pm)
Replying to: brittany232 (May 14, 2006 11:38 pm) That does sound a little low. Were you driving with windows up? With or without AC? Was the vehicle loaded with extra weight? Hilly or flat terrain? All of those factors can make a difference and there may be another one or two I'm forgetting. Keep in mind the EPA rating is based on a much slower 60 or 65 mph.
#22 of 117 2006 Impala experience/fuel economy by nosirrahg May 31, 2006 (8:31 pm)
I rented a 2006 Impala over the weekend to make the drive to Indianapolis for the 500 (which was great despite the heat). We stopped for gas somewhere north of Cairo, IL on the way there, and because the Illinois State Police were enforcing the 65MPH speed limit pretty heavily, I set the cruise control at 65 and left it there. According to the DIC we were getting 35 MPG as we crossed into Indiana, so I exited in Terre Haute and filled it up to see how accurate that was. We'd driven 174 miles at an average speed (per the DIC) of 64 MPH, on 4.836 gallons of fuel, which figures out to 35.98 MPG!! And that's with the AC on the entire trip (exterior temps were in the mid-80s as I recall). This car had 22k miles on it (which had been put on in the past 8 months), so it was well broken in which probably helped.   The best mileage I've ever gotten in my 3.8l 2000 Impala was 34 MPG, and that was driving 60 MPH in the Arkansas Delta (absolutely flat) with no AC (temps in the 50s), so getting 36 MPG with the AC on in the rolling hills of southern Illinois was darn impressive. Replies to this message: quietpro (Jun 01, 2006 6:11 am) nosirrahg (Jun 01, 2006 2:38 pm) nosirrahg (Jun 01, 2006 6:55 pm)
#23 of 117 Re: 2006 Impala experience/fuel economy [nosirrahg] by quietpro Jun 01, 2006 (6:11 am)
Replying to: nosirrahg (May 31, 2006 8:31 pm) You didn't mention which model Impala you rented. I'm assuming an LS or LT with the 3.5L engine? Replies to this message: nosirrahg (Jun 01, 2006 2:38 pm) nosirrahg (Jun 01, 2006 6:55 pm)
#24 of 117 Re: 2006 Impala experience/fuel economy [quietpro] by nosirrahg Jun 01, 2006 (2:38 pm)
Replying to: quietpro (Jun 01, 2006 6:11 am) It was an LT w/the 3.5L engine. I've got the specifics for each tank at home, and will try to remember to post them here later tonight. Being accustomed to the 3.8L engine I thought the 3.5L might disappoint me, but only once did I feel the car was a little underpowered. At one point I was merging onto the Interstate in front of a semi and I didn't feel quite as confident about it as I might in my 3.8L, but I think this was more of a lack of torque than a lack of horsepower/speed (I made it in front of the semi anyway ). Replies to this message: nosirrahg (Jun 01, 2006 6:55 pm)
#25 of 117 Re: 2006 Impala experience/fuel economy [nosirrahg] by nosirrahg Jun 01, 2006 (6:55 pm)
Replying to: nosirrahg (Jun 01, 2006 2:38 pm) Okay, here are the specifics on my brief stint with a 2006 Impala LT (3.5L): Fill #1-338.7 miles-11.824 gallons-28.65 MPG-avg 65.9 MPH Fill #2-174.0 miles- 4.836 gallons-35.98 MPG-avg 64.0 MPH Fill #3-257.0 miles- 9.594 gallons-26.79 MPG-avg 42.6 MPH Fill #4-437.0 miles-13.683 gallons-31.94 MPG-avg 65.8 MPH Fill #5-227.0 miles- 8.054 gallons-28.18 MPG-avg 47.0 MPH Total 1433.7 miles-47.991 gallong-29.87 MPG   As indicated by the speed average (per the DIC), fills 1, 2, and 4 were 100% highway driving; 3 & 5 were a mix of highway and city (skewed heavily towards highway). AC was on for the duration as best I remember.   For comparison, the best mileage we've gotten in my wife's 2003 Accord 4-cylinder was 38.83 MPG, but that was in January, so we certainly weren't running the AC at that point.   I think the EPA estimate highway is 31 for this car/engine; based on my experience that's a pretty accurate figure.
#26 of 117 2006 Impala 1000 miles by zizith Jun 05, 2006 (3:29 pm)
The mileage is slowly getting better on this LT 3.5: 26.1 with mostly highway miles, but also some city traffic. My husband says it may get better as the engine loosens up. I hope so. May post later after a few thousand miles. AC on. (AC never pulled down my mileage in my 98 Chevy Venture, but winter driving did.) Replies to this message: nosirrahg (Jun 05, 2006 4:53 pm)
#27 of 117 Re: 2006 Impala 1000 miles [zizith] by nosirrahg Jun 05, 2006 (4:53 pm)
Replying to: zizith (Jun 05, 2006 3:29 pm) I don't think I mentioned it earlier, but the rental Impala I drove to Indianapolis turned over 22,000 miles on it during the trip, so it was well broken in - hopefully that's an indication of things to come for everyone!
#28 of 117 2006 LTZ by deminin Jun 09, 2006 (11:39 am)
We have about 10,000 miles on our LTZ/3.9L now, and the fuel mileage has stabilized to an average of around 27.5 MPG. about 85% of our driving is highway, and I have recorded 29.3 as the best, so far, holding steady at 68 MPH on the interstate. A few weeks ago, I let the car have a run coming across Kansas. Traffic was light, and I ran about 200 miles between 85 and 90, and got 26.5MPG. That is quite good, in my opinion, for that speed. Luckily, I had a guy in a BMW running about 1/2 mile ahead of me at that speed, and the cops finally got him just west of Salina. I stopped, gassed up, and came the rest of the way at the speed limit. The LTZ handles great at 90!
#29 of 117 Gas Mileage by dispencer1 Jun 12, 2006 (4:41 pm)
Back in the spring before I had to run the AC full blast in this 90-100 degree weather I was getting about 20-22 around town (LT2). This is a small town where you normally drive 30-45 mph and stop only at stop signs and lights. No bumper to bumper traffic, I'm now lucky to get 18. Really disappointing. I did lots better than this with my 3.1 litre Malibu. My Deville isn't much worse. I get around 15-16 with it. I guess the answer is to get a 4 cylinder Malibu. I'll do that next time or sell both the Caddy and the Impala and get one Avalon. That will save a lot of money and get better gas mileage than either car so says a friend with a new one.
#30 of 117 Curious question by quietpro Jun 23, 2006 (6:03 pm)
Does anyone have any knowledge or know of any data posted on fuel consumption during idle? I was "forced" to wait an hour today with the engine idling. I hated doing it but had no choice. While I sat there and stewed, I wondered just how much fuel I was burning. If anyone has any idea, please pass along the info. I know consumption will vary by engine, possibly by other conditions such as temperature, AC use, etc. but I wanted to get an idea. Replies to this message: bxd (Jul 18, 2006 8:01 am)

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