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Chevrolet Cobalt Real World MPG

295 messages,  Last post on Nov 23, 2009 at 4:23 PM

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

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#259 of 295 Re: I'm new to this forum. I have a 06 Cobalt LS Auto. [pa356228] by steve333 Apr 20, 2009 (6:47 am)
Replying to: pa356228 (Apr 19, 2009 9:48 pm) That's pretty much what you should be getting. I avg 25MPG and never get 30MPG highway.
#260 of 295 Re: I'm new to this forum. I have a 06 Cobalt LS Auto. [pa356228] by laserblue Apr 20, 2009 (8:58 am)
Replying to: pa356228 (Apr 19, 2009 9:48 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 295 06 Cobalt LS auto. by pa356228 Apr 21, 2009 (12:19 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. Replies to this message: laserblue (Apr 21, 2009 3:40 am) steve333 (Apr 21, 2009 12:53 pm) pa356228 (Apr 21, 2009 11:07 pm)
#262 of 295 Re: 06 Cobalt LS auto. [pa356228] by laserblue Apr 21, 2009 (3:40 am)
Replying to: pa356228 (Apr 21, 2009 12:19 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 295 Re: 06 Cobalt LS auto. [pa356228] by steve333 Apr 21, 2009 (12:53 pm)
Replying to: pa356228 (Apr 21, 2009 12:19 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. Replies to this message: pa356228 (Apr 21, 2009 11:07 pm)
#264 of 295 Re: 06 Cobalt LS auto. [steve333] by pa356228 Apr 21, 2009 (11:07 pm)
Replying to: steve333 (Apr 21, 2009 12:53 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.
#265 of 295 tire pressure by elias Apr 22, 2009 (3:41 am)
32 psi is considered overinflating? Not by me! What are the PSI recommendations listed on the doorframe? I prefer 34 psi for my vehicles, and 34 is within the range specified on the doorframe for max-speed or max-load operation. Replies to this message: laserblue (Apr 22, 2009 9:34 am)
#266 of 295 PCV, Tires by steve333 Apr 22, 2009 (9:26 am)
Oil Change places always go for the replace PCV valve line, but you notice your dealer will never recommend it. It isn't necessary. As for the tires, the door jam says 30, my dealer and Discount Tire always puts them on 35 but I prefer to keep them on 32.
#267 of 295 Re: tire pressure [elias] by laserblue Apr 22, 2009 (9:34 am)
Replying to: elias (Apr 22, 2009 3:41 am) The tire's p.s.i. is calculated differently from a model of car to another. My 2007 Cobalt door frame says 30 p.s.i.   I also own a 2005 Equinox this one is 35 p.s.i. and for my show car... a 1977 Chevelle Malibu Classic the door frame p.s.i. requirements are at 24 p.s.i.   If I take your example of 32 p.s.i. well for my Equinox it would by "under inflated" but for my Chevelle it would be well "overinfalted".   Don't go by what's written on the tire (like most people do) that's the max-speed and max-load operation of the tire. Always go by the car's door frame recommendations.   By the way...you didn't mention what type of car you drive.
#268 of 295 06 Cobalt LS by pa356228 Apr 23, 2009 (10:58 pm)
My doorframe says 30 psi but the tires says never to exceed 40 psi. Strange world. Guess we will never know. Funny how the world works, but my advice I can give is just go what best suits you.   My uncle is a mechanic, for his cars he always put 32 psi in all his tires and even with my cars. He never had problems with 32. Today, I set all my tires at 30 psi, according to the doorframe and see how well that goes for gas mileage and tires for a week or two. Also, some tire shops, have hydrogen tires which they said will also increase gas improvements and last longer than original tires.    Also, I drive a 2006 Chevy Colbalt LS (4-doors sedan) now with 51,303 miles. I will take my car in for an oil change on tuesday and going on a long trip on wednesday VB,VA to Pittsburgh, PA (450 miles or 8 hrs) and will calculate m/g/mph to accurate mpg. I'll post results. Replies to this message: tsjay (Apr 24, 2009 2:23 pm)

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