Different Estimated MPG for Different Year Models? - Chevy Cobalt Forum / Cobalt Reviews / Cobalt SS / Cobalt Parts
All about MPG All about maximizing your Miles Per Gallon (MPG)

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post #1 of 23 (permalink) Old 03-30-2012, 07:09 PM Thread Starter
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Different Estimated MPG for Different Year Models?

Just wondering, do some cobalt's get better estimated MPG on select years, I heard that the newer Cobalts get better fuel economy than the older ones.

Is it true?

Old Car: Chevy Cobalt 2006 LS Sedan base (Automatic)

New Car: Chevy Impala 2011 LT Fully Loaded (Automatic)
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post #2 of 23 (permalink) Old 03-30-2012, 07:20 PM
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Yep! Lighter cars, FE tires different final ratios.

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post #3 of 23 (permalink) Old 03-30-2012, 07:27 PM Thread Starter
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Thanks for the reply.

Is there anyway I can imitate the same differences to get better MPG, besides the tires?

Old Car: Chevy Cobalt 2006 LS Sedan base (Automatic)

New Car: Chevy Impala 2011 LT Fully Loaded (Automatic)
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post #4 of 23 (permalink) Old 03-30-2012, 07:33 PM
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Check the MPG thread. FR3AKAZOID IS AN EXPERT

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post #5 of 23 (permalink) Old 03-30-2012, 09:36 PM Thread Starter
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Great, took a look at some of those, but didn't find as much information as I wanted, but it is late, with a Coors Light in the system too, I may find more information tomorrow.

To be honest, I can have my days when it comes to MPG, the other day I pissed off my wife so much been such a cheap @$$, not talking about spending money, on the contrary, I put premium gasoline, which was $0.40 more than regular, I put about 8 gallons, spending a total of $3.20 more by getting premium. The purchase of premium was not the reason why my wife was annoyed, it was the way I was driving, I was constantly looking at that Average MPG (which I very recently reset), that day I managed to travel about 100 miles (mainly expressway, 70MPH) but some city too, real crappy city too, still managed to maintain an average almost 40 MPG, but all that taking off very slow (less than 2000 RPM) and the going over the bridges (over pass exits here in TX) on the expressway, I would slow down about 10 MPH every one, but then slowly increase speed on the way down, it was very frustrating, but it worked, I got way better MPG doing this.

Long story short, I can do the driving part when it comes to MPG, but are there any mods to the engine/trans/electrical I can do to help out?

Old Car: Chevy Cobalt 2006 LS Sedan base (Automatic)

New Car: Chevy Impala 2011 LT Fully Loaded (Automatic)

Last edited by johnccc; 03-30-2012 at 09:39 PM.
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post #6 of 23 (permalink) Old 03-31-2012, 12:04 PM
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I have done some of these and plan to do some more.
Others I would never do due to cost or looks.

Low rolling resistant tires
Pumping tires up to just below sidewall rated max
Getting an alignment and shim kit for the rear end to reduce toe
Mobile 1 Advanced Fuel Economy oil
Partial grill block
Full undercarage belly pan
Rear wheel skirts (hard to make not look fugly)
Boat tail rear (hard to make not look fugly)
Full moon hubcaps
Avoid A/C and Heater use
Warm air intake in the winter
Side mirror delete and replace with interior mirror (where allowed by law)
Final drive replacement*
Replace running, brake, and turn lights with LEDs (NOT HEADLIGHTS)*
Remove alternator, A/C compressor, and drive pulley and replace with deep cell battery pack, DC to DC charger and charge controler (limits range)*
Underdrive pully*
Lower a little (not slammed)*


*Will improve MPG but costs will exceed gas savings.


Last edited by Fr3AkAzOiD; 03-31-2012 at 01:26 PM.
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post #7 of 23 (permalink) Old 03-31-2012, 12:52 PM Thread Starter
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Some of that I can do, hopefully I can do it little by little. Running without AC is out of the question, during the day (100*F weather), however I can drive with the windows down in the night.

Old Car: Chevy Cobalt 2006 LS Sedan base (Automatic)

New Car: Chevy Impala 2011 LT Fully Loaded (Automatic)
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post #8 of 23 (permalink) Old 03-31-2012, 01:01 PM
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Driving with windows down is harder on gas than A/C, because it creates drag. Proven on Myth Busters. I know my Corvette is harder on gas with moon roof removed than with car closed up and A/C on.

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post #9 of 23 (permalink) Old 03-31-2012, 01:37 PM
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Quote:
Originally Posted by Coby7 View Post
Driving with windows down is harder on gas than A/C, because it creates drag. Proven on Myth Busters. I know my Corvette is harder on gas with moon roof removed than with car closed up and A/C on.
Windows open is better below 45 mph and A/C is better above 55 mph.
In between it varies between make and model.

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post #10 of 23 (permalink) Old 03-31-2012, 06:32 PM Thread Starter
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I thought on MythBusters, the car with the A/C on ran out of a liter of gas 1st, the windows down car went around the track several more times.

I think using the blower motor with no A/C would be the best choice, no drag, no A/C.

Old Car: Chevy Cobalt 2006 LS Sedan base (Automatic)

New Car: Chevy Impala 2011 LT Fully Loaded (Automatic)
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