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Chevrolet Malibu MPG-Real World Numbers

288 messages,  Last post on Nov 27, 2009 at 5:37 PM

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What is this discussion about? Chevrolet Malibu, Chevrolet Malibu Maxx, Fuel Efficiency (MPG), Hatchback, Sedan


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#253 of 288
04 Malibu Maxx Mileage by pao
Sep 25, 2009 (6:49 am)
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still amazed at the decrease in mileage the new malibus are seeing..seems it has declined since the 06-07 MY....an 04 Maxx LT here..with auto and 6 cyl...I regularly get 25 avg in the city driving...and 30-32 MPG highway doing 70 MPH.....increased my tire size from the OEM 16 inch rims to a wider 17 inch rim for a better ride....lost a bit on gas mileage but not enough to be concerned with..probably increased weight with rims and tires....as well as the wider profile on the tire......
 
have over 154K on the car..and still going strong
#254 of 288
Re: Not as advertised [e_net_rider] by phil53
Sep 25, 2009 (8:55 am)
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Replying to: e_net_rider (Sep 25, 2009 3:43 am)

I've not experienced the problems you mention. But, my car came with the Goodyear Eagle LS2 tires in a 225/50R18. In fact, one of the things that has impressed me about this car is the level of grip and handling for a mid-level, middle-of-the-road sedan. It won't challenge the 'Vette, for sure. But it beats out a lot of cars I have driven.
#255 of 288
Re: Not as advertised [phil53] by e_net_rider
Sep 26, 2009 (12:25 pm)
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Replying to: phil53 (Sep 25, 2009 8:55 am)

Is there some way to; add a vehicle profile in this forum?
#256 of 288
06 Maxx vs. 05 Base by malexbu
Sep 30, 2009 (7:30 pm)
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Over the last month, with comparable driving patterns, the MPG numbers were:
 
  ____________DIC___Real__Error
  2005_Base___29.4__28.4__1.0
  2006_Maxx___27.1__24.7__2.4
 
A surprise for me in the bottom RHS corner.
#257 of 288
Actual MPG For New 2010 Malibu by john178
Oct 16, 2009 (6:03 pm)
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I have owned my 2010 Malibu 2LT 4 CYL for only 1 week. I compared/contrasted the Accord and Camry with this Malibu- the Malibu won hands down. On a trip just today on the interstate (200 miles), my MPG, going between 70-75 MPH ( and using Cruise Control), varied between 32-37. The interior quality and design on this car is outstanding. The safety features are second to none. This is the first 4 CYL. car I have owned in years- remarkable power for a 4 CYL- GM finally did this car right by making available the 6 speed automatic transmission. This car has to be one of GM's best kept secrets.
#258 of 288
Re: Actual MPG For New 2010 Malibu [john178] by e_net_rider
Oct 17, 2009 (6:16 am)
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Replying to: john178 (Oct 16, 2009 6:03 pm)

I will be going to Jacksonville tomorrow, so I will see what a run on I-95 produces. This highway often has a flow of 80MPH and will likely kill mileage at that speed.
I have a fair idea of what might be causing low end MPG. It seems that this engine is relatively inefficient under acceleration. The figures I'm seeing on the DIC with normal traffic acceleration or going over a high bridge are much lower than numbers shown on the 4.0 V8 Aurora and my experience with Town Cars. Both of the latter would upshift much quicker. Both are much heavier cars too.
There was an old rule of thumb that an engine was at its peak efficiency at the maximum torque RPM. I will have to find what that is for this engine and see if I can spot a correlation. I'm beginning to suspect that GM shortcut the process of working toward highest MPG by simply slapping a 6 speed behind an engine and the two are not well matched because of such an approach.
#259 of 288
Re: 2008 Malibu LS MPG [packer3] by 07maxx
Oct 18, 2009 (10:37 am)
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Replying to: packer3 (Mar 21, 2009 6:58 pm)

Don't know why you would say that. I have 77K on my '06 which turned 3yr this last month. Never abused. Just driven 25K/yr. I average 29+ mpg with the 3.5L V6, with a 75/25 hiway/city mix. On extended trips I'll get 33mpg at 75-80mph. I'm very pleased and run Mobil 1, with a change every 10K miles. Struts are shot, so putting in a set of Monroe Sensa-Tracs, front and rear.
#260 of 288
Re: 2008 Malibu LS MPG [07maxx] by malexbu
Oct 18, 2009 (6:09 pm)
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Replying to: 07maxx (Oct 18, 2009 10:37 am)

Struts are shot, so putting in a set of Monroe Sensa-Tracs, front and rear
 
Want to ask you about the struts, since our cars are similar.
 
I got a 2006 Maxx this summer, in addition to my two 2005 Base Sedans.
Maxx is nice but in some respects I like the sedans more. One
conspicuous difference is the cars' sensitivity to the road
imperfections. Both my sedans flow over them, on the highway or local
roads.
 
Maxx reacts to the imperfections in a manner that makes both driver
and passenger feel less comfortable -- "doesn't float over", that's
how I'd put it. If I didn't have four years' experience with the
sedans, I would not probably notice Maxx's way -- the ride is
pleasant, in general. But the comparison makes me wonder about the
cause and I did a bit of research on struts and shocks; from what I've
read it is too early for me to change them: my Maxx is now at about
57K miles, and the shocks and struts are usually good till 80K --
which is right at about where your car is.
 
So, how do you know that the "struts are shot"? Why did you decide to
go with Monroe Sensa-Tracs? What do you expect to pay? (From what
I've read, it's about $1200 -- is this right?)
 
Anything anyone can tell me about the suspension, shocks and struts,
will be appreciated.
#261 of 288
Re: Actual MPG For New 2010 Malibu [e_net_rider] by e_net_rider
Oct 19, 2009 (4:01 am)
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Replying to: e_net_rider (Oct 17, 2009 6:16 am)

Made trip to Jacksonville Zoo and put on about 300 miles, 240 of them being I-95. The DIC shows 29.5MPG. Likely it would have been higher for just I-95, but I am now suspicious that the DIC is off when showing instantaneous MPG. It was frequently in the mid/lower 20's when running 80MPH.
Also, I was reminded there is a shift point at 50MPH. Prior to this vehicle, all 4 speed (with overdrive) and TCC lock would do the final change at 40MPH. Some would lock TCC before going into overdrive, others did the lock as the final change, so I'm not sure if the bump I feel at 50MPH is last gear or TCC lock.
If anyone know the shift pattern of the AT6, please respond. It can be helpful in getting best mileage. But on the down side, it is programmed to force downshift and not free wheel till stopping. One of the things that I'm sure helped with the Aurora. The tire combination with aerodynamics, it seemed to roll forever, so with paying attention to lights and traffic I could get as high as 19MPG local driving. If I got caught in stop and go, bumper to bumper mileage would drop to 16 or 17MPG.
Also there is the possibility that these Firestone FR710 dragged mileage down a bit. In part because the temperature dropped a lot overnight and the DIC was indicating 27# in the morning when we left. I thought it would warm up a lot during the day, but did not and DIC was indicating 30 to 31# after getting on highway. This could be why I was also unhappy with the handling, but the ride was quite smooth for a car of this size.
#262 of 288
Re: Actual MPG For New 2010 Malibu [e_net_rider] by malexbu
Oct 19, 2009 (4:57 pm)
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Replying to: e_net_rider (Oct 19, 2009 4:01 am)

So, you put on 300 miles and could have calculated your real MPG for this trip quite accurately by fueling the car at the end and doing a simple computation. Instead. you rely on the known liar the DIC. From my own experience, and having read all the users' stories, your MPG for this trip was about 28 MPG. (29.5 - 1.5).
 
And how would you know that I am wrong?
 
Measure the mileage and fuel, then divide, at each fillup, you'll likely see the difference.
 
Of course, believing the DIC's reading is a pleasanter thing

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