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Chevrolet Cobalt General Care & Maintenance

133 messages,  Last post on May 29, 2009 at 7:13 AM

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What is this discussion about? Chevrolet Cobalt, Oil, Paint, Coupe, Sedan

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#84 of 133 Re: oil [harrisblack] by okko1 Sep 29, 2007 (2:43 pm)
Replying to: harrisblack (Sep 29, 2007 12:03 pm) your chevy dealer will say it is gm oil and will have a number of different bulk lubricantsmy cobalt it seems has to have mobil 1 and they stock it for gm cars with this requirement.
#85 of 133 Re: oil [harrisblack] by poncho167 Sep 30, 2007 (5:32 am)
Replying to: harrisblack (Sep 29, 2007 12:03 pm) GM Goodwrench oil used to be made be Mobil one, non-synthetic. I am not sure what they are using now, it could be still Mobil. I am surprised your manual doesn't show 10w-30 as an option. 10w-30 is a good summer weight, but I put in my winter/all around grade 5w-30 yesterday. Replies to this message: wr_guy (Oct 02, 2007 7:10 am) poncho167 (Oct 05, 2007 5:35 pm)
#86 of 133 Re: oil [poncho167] by wr_guy Oct 02, 2007 (7:10 am)
Replying to: poncho167 (Sep 30, 2007 5:32 am) They recomend 5/30 because it is easier to pump and gives better gas mileage year 'round. Also modern manufacturing tolerances are tighter than ever and they want the thin oil to reach all the tight spaces in the motor.   I would not use 10/30 oil in a new motor, but I would use it in a car with over 40k miles in the summer at least. Replies to this message: poncho167 (Oct 05, 2007 5:35 pm)
#87 of 133 Re: oil [wr_guy] by poncho167 Oct 05, 2007 (5:35 pm)
Replying to: wr_guy (Oct 02, 2007 7:10 am) Most of what I have read is that 10/30 and 10/40 weight are prefered during the summer, and 5/30 is good to put in during the winter or as a year round oil. I use 10/30 in the summer for better mileage.
#88 of 133 5w-20 by jtk152 Oct 07, 2007 (3:07 am)
You cant go wrong with sticking with what the manufacturer specs, which is currently 5w-30 for the 2.2L Ecotec. I have seen used oil analysis reports on an Ecotec 2.2L running 5w-20. The numbers consistantly came back spotless based on 7-10Kmi oil change intervals, so 5w-20 or 0w-20 also work perfectly in the 2.2L. Today's 5w-30 are so consistantly good, I don't see the point of 10w-30 anymore. Why start a cold engine on a 10wt when you can get oil pumping faster with a 5wt? They are both a 30wt at normal operating temps. There's no point in it and TONS of data to back that up.   Joel
#89 of 133 oil by harrisblack Oct 07, 2007 (11:15 am)
The manual I am talking about is the one that comes with the car. On page 289 it says Do Not Use SAE 10w40- SAE 20w50 or any other viscosity grade oil not recommended which should include 10w30.   We live in New Orleans and this Jan I will change to synthetic oil 5w30. The car still has factory oil and only 1200 miles.
#90 of 133 Paint Chipping by harrisblack Oct 13, 2007 (10:57 am)
Is anybody else having problems with the screw ends that go thru the door chipping the paint on the front posts?
#91 of 133 Major RPM flutter 2007 2.2L 4T45E by jtk152 Oct 21, 2007 (4:18 am)
Anyone else experiencing a flutter or RPM bounce when the transaxle shifts into 4th during moderate acceleration? This is on my 2007 2.2L, 4T45E equipped Cobalt. It seems to only happen once fully warmed and I'm not positive if it's happening on the 3-4 upshift or during torque converter lockup in 4th. There is no check engine light and other than that, it runs flawlessly and has been perfect. I have heard of one or two other 2007 owners with the same concern. No issue was found by their respective dealership service depts. I'm also not exactly sure if this is a throttle by wire problem, transmission problem, etc.. Basically the tach will bounce up/down about 500RPMs at about half second intervals during what feels like the 3-4 shift. You can hear it and feel it as well.   Joel Replies to this message: cmhj2000 (Oct 21, 2007 8:46 am) caprice259 (Oct 27, 2007 6:34 pm)
#92 of 133 Re: Major RPM flutter 2007 2.2L 4T45E [jtk152] by cmhj2000 Oct 21, 2007 (8:46 am)
Replying to: jtk152 (Oct 21, 2007 4:18 am) Hey Joel, good to see you over here.   Your concern/issue is one I've not seen or heard yet. However, I'll put the word out.
#93 of 133 Tires by grosloup Oct 22, 2007 (3:31 am)
I always drove S.U.V.s and Vans in the past and I never had snow tires installed on them. I drove all year with all season tires. Now that I purchased a Cobalt I wonder if I should put snow tires on it. It's smaller and lighter compare to a S.U.V. or Van and I figure the weight of the car could make a difference in the snow. Replies to this message: jtk152 (Oct 22, 2007 7:17 am)

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