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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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#18 of 117 05 Impala 3.4lt. by ottobond007 Apr 25, 2006 (2:25 pm)
I have a 05 Impala. The question I have is. I live in WI. but the car has California emission's on it. Should I exspect better , worse or the same mpg. then a standard emission car ? Right know the best I get on the hwy. with the curse lock at 69 is 25 mpg. not what I espected.
#19 of 117 SS mileage Update by quietpro May 14, 2006 (10:11 am)
Just thought I'd post an update and some tips. I just finished an 1,100 mile roadtrip and managed to squeak out just over 25 mpg (25.34) in my '06 SS. I experimented a lot on the trip and have found that I can usually keep DOD activated at speeds up to 75 mph by following almost any vehicle with up to a 3-5 second following distance. Obviously 18-wheelers have the largest wake but SUVs and other mid or full-size cars seem to create enough of a wake to maintain DOD activation. Even better, traveling behind a group of vehicles.   I found that trying to keep the DOD engaged helped alleviate the stress I normally feel when people insist on driving side-by-side and blocking the passing lane. Some may think I'm following too closely but I assure you, I was keeping a more-than-adequate following distance, usually 2 to 3 seconds. The hardest part was finding someone travelling at a consistent speed although I was usually able to find a "buddy" or two traveling at 75 mph. A final note, I could even maintain up to 80 mph (with DOD) as long as I had a large truck or group of cars to follow or even intermix with. But, not many seem to use their cruise control consistently over 75 mph.   My experimenting helped keep me occupied during the long and boring stretch of I-10 between Pensacola and Jacksonville, FL. It also kept me from getting too heavy-footed.
#20 of 117 Re: '06 SS mileage [wold_77] by brittany232 May 14, 2006 (11:38 pm)
Replying to: wold_77 (Apr 09, 2006 8:50 pm) I agree!! I have an 05 std v-6 that is only getting 22mpg freeway? YEP, me too,, I went the same, about 320 miles on that tank. So far Im very disappointed. My city driving is a bit lower than that. I tested it.. Filled my tank and hit the freeway on a trip I had to make, and that was my result. Not sure if its the fact that Im going 78mph or what? I have it on cruise. Not at all what I was told at the dealership. Replies to this message: quietpro (May 15, 2006 1:59 pm)
#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!

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