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Chevrolet Cobalt Real World MPG

304 messages,  Last post on Mar 24, 2012 at 5:39 PM

You are in the Chevrolet Cobalt Forum.

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

Messages Page 27 of 31

#255 of 304 Got 34 mpg, '09 Cobalt automatic, SF to LA by micweb

Apr 16, 2009 (2:36 pm)

Got 34 mpg, '09 Cobalt automatic, SF to LA.
 
Usually commute mileage is around 29-30.

#256 of 304 Re: Where's my 37 MPG? [malexbu] by poncho167

Apr 17, 2009 (8:26 am)

Replying to: malexbu (Apr 13, 2009 6:38 pm)
Don't have data but it is well known that the quality of a brands gas can be as much as 2-3 mpg/

#257 of 304 Re: Where's my 37 MPG? [poncho167] by malexbu

Apr 17, 2009 (4:42 pm)

Replying to: poncho167 (Apr 17, 2009 8:26 am)
How would you explain that? If they get gasoline from the same
refinery, which is quite likely
 
I mean no disrespect but I've seen not a single piece of data to
support the claim that it is well known that the quality of a
brands gas can be as much as 2-3 mpg.
 
Different brand differ primarily, as far as I understand, in the
composition of the fuel detergent added. This may have effect on the
engine's health, long term, but it's not easy to change the amount of
energy a gallon of gasoline produces.
 
I do prefer to use a brand gas (will use no-name only rarely), but
this is purely for the detergent.
 
Would love to see the data showing the MPG advantage of a brand
name.
 
"Well known 2-3 mpg"... People refer to each other's words and an
urban legend gets born. I could believe 1/2 mpg difference, but 3?..
Let somebody show the data, not perceptions.
 
I watch my MPG like a hawk -- and here is my data: on a trip from TN
to MA, I filled up at three gas stations: Shell, Sheetz, Citgo. The
MPG (calculated as "the distance to the volume") for the three legs
fueled by each was as follows:
 
   Shell - 36.8, Sheetz - 38.9, Citgo - 36.3.
 
(This is for a 2005 Malibu with Ecotec 2.2L.)
 
It's either Sheetz is brandier than the rest or... well, something
else.

#258 of 304 I'm new to this forum. I have a 06 Cobalt LS Auto. by pa356228

Apr 19, 2009 (10:48 pm)

My Cobalt LS (4-door sedan) auto gets about 27 mpg average (mostly city driving)
and gets about 31-34 mpg on hwy. I usually keep my tires at 32 psi as my door panel says 30 psi, is that bad for my tires. How can I get more mpg out of my car? Did change the spark plugs 3 weeks ago, and actually gave my car 1 mpg more when I start the engine.

#259 of 304 Re: I'm new to this forum. I have a 06 Cobalt LS Auto. [pa356228] by steve333

Apr 20, 2009 (7:47 am)

Replying to: pa356228 (Apr 19, 2009 10:48 pm)
That's pretty much what you should be getting. I avg 25MPG and never get 30MPG highway.

#260 of 304 Re: I'm new to this forum. I have a 06 Cobalt LS Auto. [pa356228] by laserblue

Apr 20, 2009 (9:58 am)

Replying to: pa356228 (Apr 19, 2009 10:48 pm)
It looks like you're doing pretty good m/p/g. right now.
  By the way I see it, you should the one giving some advice instead of asking for some. I could add that a clean and well waxed car helps the m/p/g to.
  For your tire pressure, 32 p.s. i. isn't that bad but the ride must be a bit bumpy?

#261 of 304 06 Cobalt LS auto. by pa356228

Apr 21, 2009 (1:19 am)

Yeah, the ride is a little bit bumpy, Should I just go by the door panel psi on tires for safe bet? I know I should be giving some advice. My only advice to give is to keep checking your tires and psi, and also change the oil, pcv valve and all filters every 3,000 miles. Pre-trips inspections is great for your car which can help you in the long run and also saves you costly repairs. Also, drive solo, really does give you more mpg and is easy on your car.

#262 of 304 Re: 06 Cobalt LS auto. [pa356228] by laserblue

Apr 21, 2009 (4:40 am)

Replying to: pa356228 (Apr 21, 2009 1:19 am)
My tires p.s.i. is always at the vehicle recommendation.
Like you already know you should check your tire pressure when tires are cold or when you didn't move your car for a couple of hour.
If you do lots of highway driving your p.s.i. will increase by itself by a couple of ponds, faster in summer or hot pavement.
  If you want my advice let them at 30 p.s.i. an over inflated tire is as bad as a under inflated one. Eventually you will see that your tires will get worned-out prematurally.

#263 of 304 Re: 06 Cobalt LS auto. [pa356228] by steve333

Apr 21, 2009 (1:53 pm)

Replying to: pa356228 (Apr 21, 2009 1:19 am)
why on earth would you change the pcv valve every 3000 miles?
The only filter that needs to be changed is the oil filter. The air filter and cabin air filter get changed at longer intervals.

#264 of 304 Re: 06 Cobalt LS auto. [steve333] by pa356228

Apr 22, 2009 (12:07 am)

Replying to: steve333 (Apr 21, 2009 1:53 pm)
I heard that the pcv valve will make a difference by changing it while changing the oil. Heard it from a mechanic once, with some of my old cars I used to have. Doesn't make sense. I know, don't follow through anyways and always when my car needs an oil change, I'll take my car to a chevy dealer to get service.
 
Anyways, having you car in line (aliments) will make a big difference on your gas mileage and tires also.

Messages Page 27 of 31

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