Last post on May 28, 2013 at 6:32 AM
You are in the Chevrolet Malibu
What is this discussion about?
Chevrolet Malibu, Chevrolet Malibu Maxx, Fuel Efficiency (MPG), Hatchback, Sedan
#442 of 471 Re: 2011 malibu ltz 2.4l, 6sp auto [malexbu]
Nov 05, 2011 (6:41 pm)
Boy, Malexbu, I sure didn't mean to push you towards Honda or Toyota. I'd definitely buy another GM car over a Honda or Toyota. I find those cars a bit too boring and I do think their reputation for reliability is over-blown. The reliability of my GM vehicles has been pretty good. I've just been a bit disappointed with the fuel mileage and the operation of that specific engine and transmission combination. But I've not had problem with the reliability.
Plus, I really like the idea of 'buying American', as cliche as that may be. Yes, I know that Honda and Toyota make cars in the US, BUT - they take money out of the economy more than they put in. All their profits go back to Japan; they build in areas where they get tax abatements so they're not putting any money directly back in our economy and they pay less than the US manufacturers, so they drive down the wages of car builders everywhere and lower the standard of living. Just my humble opinion.
Furthermore, your assertion that GM does not have the reputation of Honda or Toyota shows that you are fairly young and are looking only at recent history. I would remind you that Chevrolet has been around twice as long as either of those brands and that Chevrolet was the top selling and most admired brand in the US for 52 years. I remember well when "Made in Japan" meant it was junk. Chevrolet is a cultural icon. You don't hear songs about Hondas or Toyotas. ("See the USA in your Chevrolet"; "Drove my Chevy to the levy"; ".. in the backseat of my '60 Chevy"; etc, etc.) I think GM is making a major come-back and deserves to be considered side-by-side with their Japanese competitors.
I'll get off my soap-box now....
#443 of 471 Re: "A better MPG with more miles on a car" -- the old urban legend [dave8697]
Nov 05, 2011 (6:28 pm)
On your first tanks' MPG improvement: any chance that the weather was getting warmer? When did you buy your car, and what Malibu is it? (Perhaps you've posted it before, but it's probably easier for you to repeat than for me to search over the old posts...) Also, any chance you've been changing your way of driving, adjusting to the car as you drove it more?
And I have to add that I wouldn't claim that the MPG doesn't improve over the break-in period, which is 600 miles for Malibu. It may or may not, but I am not saying anything about it. But I wouldn't expect that a Malibu with 3K miles will be getting a consistently better MPG when it is at 6 or 20K, all things being equal, which includes the weather and driving conditions and patterns.
#444 of 471 Re: Mileage comment [ohc6sprint]
Nov 05, 2011 (6:39 pm)
I do know 'how to drive efficiently'. I choose not to. That would drive me nuts. I'd rather walk. Quite frankly, if you drive 60 on the freeway/interstate around here, you're a road hazard and you'll get run over. At those speeds, you should stick to the side roads. But maybe that's a midwestern thing.
I should not have to practice 'hypermiling' or drive like an old lady to get the posted mileage. I drive the way I drive and I get the advertised mileage on my Corvette and my Avalanche. I got it on all 3 of my Yukons and my Chevy pickup. I think I got it on my Cutlass and my Bonneville (I don't remember for sure).
All that said, I do agree that highway mileage means no mix of city or suburban - strictly on the highway.
#445 of 471 Re: Mileage comment [phil53]
Nov 05, 2011 (9:56 pm)
All good points; I don't "hypermill" either and I do drive faster than 60, especially when traffic dictates. The thing that I do most consistently is to keep my tires inflated close to 35 psi, stay under 70 mph and anticipate slowing or stopping thereby conserving energy. My point is that one should understand that bad driving techniques reduce MPG through no fault of the car. If they don't get the concept and then post that they are unhappy with their mileage, then they are wasting everyone's time and influencing people negatively.
On the other hand, if someone does everything correctly and still gets substandard fuel economy, then they have credibility and deserve to be heard from. Hopefully, they will lay it out in their post so that readers can determine whether or not their claims have merit.
I will leave you with this link to how the HWY mpg test is conducted:
It is a 12.75 minute test done on a dynamometer between 68 and 86 degrees. According to the test graph, the vehicle starts out at 0, accelerates to 50, slows to 30 once and accelerates to 60 and ends at 0. There are some small fluctuations, but never exceeds 60 mph, and the average speed is 48.3 mph. There are other graphs that are worth looking at, including future tests like cold weather, air conditioning and high speed (80 mph).
This chart gives detailed test comparisons:
Hope this aids the discussion.
#446 of 471 Re: "A better MPG with more miles on a car" -- the old urban legend [malexbu]
Nov 08, 2011 (8:58 pm)
6 spd 4 cyl bought last day of Feb 2010. MPG went up from 25s to 27s by late that year. Then this past summer it went up to 30 by end of summer and 9000 miles on it. So yes, it improved in warmer weather each summer but the second summer was almost a 10% increase from the first summer. It's been 33-37 temps most mornings lately and it is still hitting 30 on the trip to work. Cold weather increases drag but feeds engine more oxygen, possibly balancing out. The drive takes 22 minutes so it is warmed up for most of the trip. Wind can be a big factor.
#447 of 471 Re: "A better MPG with more miles on a car" -- the old urban legend [dave8697]
Nov 09, 2011 (5:49 am)
>Cold weather increases drag but feeds engine more oxygen, possibly balancing out.
I've thought about this often. The cold air has slightly higher density but then summer time brings higher humidity in the air. In the "old days" the higher humidity was thought to help the mixture burn better--sort of like the impression that a car ran better when it was raining due to the higher humidity with the carbureted engines.
Summer time brings more alcohol in the gasoline at some stations and EPA required forumulations on fuel in some regions, which are thought to give less mileage. Now the gasoline probably has 10% ethanol whenever they can get by with it that high due to the government paybacks to big business companies farming the corn and making ethanol from the corn.
The biggest factor I think, is the transmission on the automatic cars I have. I can start out when the trans is garage cool and it takes about 5-8 minutes before the mileage reading gets to higher values. I believe it's the transmission oil giving more drag. I put Dexron VI in my car where it was supposedly compatible with the original Dexron IIIe. The VI is essentially a synthetic and has a thinner viscosity in my judgement at cooler temps, just like synthetic engine oil is more consistent in its viscosity. I think it made a small difference in those cold starts.
The difference in Dex VI affected the shift quality beyond the ability of my transmission to adapt by its computer control of shifts. So I drained and refilled with the original quality fluid.
#448 of 471 Re: "A better MPG with more miles on a car" -- the old urban legend [dave8697]
Nov 09, 2011 (9:29 am)
I Bought the 2011 6spd 4cyl in June of 2011. Was getting 28/30+ HWY,.......
Since September on it is 33.8 upto 35 HWY driving with sun roof open,
& int cold air circulation on, 60 to 70 mph.
#449 of 471 Re: "A better MPG with more miles on a car" -- the old urban legend [agent_m]
Nov 09, 2011 (1:27 pm)
not much summer humidity around central IN. Too far from the great lakes, the gulf, and the Atlantic. I spent the first 3/4 of my life within a few miles of the Atlantic so I'm familiar with sea level summer humidity. There has not been much change in pure hwy mileage since new, but the actual mpgs are what has been improving.
#450 of 471 2011 Malibu w/ poor gas mileage
Feb 13, 2012 (4:08 pm)
I have a 2011 Malibu LT, 4 cylinder 6 speed. The car is great except for gas mileage, which is horrible; 14.25 city, which is about all I drive. I got 29 when on a trip out of town. (I really liked my 2008 Malibu w/ 6 cyl and 4 speed. It got low to mid 20s in the city, and depending on how fast I drove on the highway, 35 mpg.)
I've had the car 8 months, 4,200 miles. I took it to the dealership. First they said to manually calculate the mpg and bring gas receipts.
They checked for codes, campaigns. Couldn't find anything. Didn't charge me anything, luckily.
Any ideas, GM customer service rep?
#451 of 471 Re: 2011 Malibu w/ poor gas mileage [bu2011]
Feb 13, 2012 (9:47 pm)
Good luck with getting a "GM CS rep"'s help!
14.25 is more accuracy than the DIC shows, so I assume you are calculating your MPG based on the fuel purchased, and since you are comparing with the 2008's numbers, which look just right, I believe that the horrible 14.25 is for real... Tough to bear, even with the city traffic lights
You might have done it already but I would try to do what I could do on my own:
1. Add a bottle of Techtron or a similar fuel additive to the tank, when fueling.
2. Open the air filter box, and clean everything I could reach with a vacuum cleaner.
Hard to predict the results but easy to do, so why not?..