Oil Change - Chevy Cobalt Forum / Cobalt Reviews / Cobalt SS / Cobalt Parts
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post #1 of 22 (permalink) Old 05-02-2010, 11:28 AM Thread Starter
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Oil Change

I got my car used from a ford dealership its a 2008 cobalt ls sedan. whatever oil they put in it, it said it didnt need to be changed until 5k miles. does it depend on the oil used or what cause im at 25% and im nearing 52k miles i got car at 47k. getting oil changed every 5k miles safe or no?

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post #2 of 22 (permalink) Old 05-02-2010, 12:09 PM
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I always go by mileage. 3-5K seems to be the consensus but again, it depends on the oil and how hard you use your car. I change my oil every 3K with Mobil 1 Full Synthetic.

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post #3 of 22 (permalink) Old 05-02-2010, 12:13 PM
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I've got a 2005 Cobalt, and since mid-2008 I've been obeying the computer and only changing the oil when it tells me to. I went 7,500 miles between oil changes and then made this video: YouTube - 7,500 miles between oil changes - no problem

After that, I went another 8,000+ miles until my next oil change, which I did about a month ago. No problems at all so far. The engine still sounds fine.

When I bought the car new at the dealership back in 2005, the salesman told me to ignore the 3,000 mile/3 month rule and to only change the oil when the computer said so. I ignored him because it sounded too good to be true. Later, I noticed that the Cobalt User's Manual also said to obey the computer, and that some cars would need fewer than one oil change per year. I started investigating back in 2008 and also found some YouTube vids released by GM in which they again reassured owners that following the computer was the way to go (you can probably still find these vids if you search). Popular Mechanics also did a study many years ago--which I found during the course of my research--that concluded the 3,000 mile/3 month rule was obsolete thanks to better oil additives and better car engines, and modern cars can last just as long having the oil changed every 5,000 miles/5 months or even less often than that. Finally, I called up the GM dealership where I bought the car and talked to a mechanic in the Service center, where they do oil changes on Chevrolets all day. He confirmed that the 3,000 mile/3 month rule was bunk, and that you were best off saving some time and money and following the computer. It's not a joke. The oil industry and the car service places keep perpetuating the myth that your car engine will break down someday unless you change the oil every 3,000 miles or 3 months because they make more money when people keep bringing their cars in for needless service.
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post #4 of 22 (permalink) Old 05-02-2010, 12:19 PM
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I would say it's probably safe to go longer on oil changes but I myself stick to the 3-5k oil change. it's just my preference. I'd rather be safe than sorry.
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post #5 of 22 (permalink) Old 05-02-2010, 01:04 PM
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^This. For me, as well, it's a matter of preference.

---------- Post added at 04:04 PM ---------- Previous post was at 03:57 PM ----------

I cringed when you placed the cup of oil on your car and again when you rested the oil drain pan on the hood lol.

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post #6 of 22 (permalink) Old 05-02-2010, 01:15 PM
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hahahaaha yeah i cringe at that stuff too. like nails on a chalk board haha

---------- Post added at 03:15 PM ---------- Previous post was at 03:07 PM ----------

even though I do change mine in the 3-5 range. I don't disagree with proyas
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post #7 of 22 (permalink) Old 05-02-2010, 02:50 PM
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I've gone by the DIC. If you change synth at 3-5K intervals, you might as well be dumping new bottles of the stuff in the trash. Modern oil is much better in its characteristics than oil of 10 to 20 years ago. The detergents are better and the oil doesn't degrade nearly as fast. The old 3/5K intervals were mainly meant for use with older oils such as SAE-30 that didn't have the robust addatives that modern oil does. Most oil change places still adhere to the system primarily because it is good business. They make much more money promoting at least 4 oil changes a year (Or more if you actually drive more than 3K in 3 months of time) than they do promoting doing it only when the OLM says so. It used to be that GM's OLM system was based on milage, but the one in the Cobalt is calculated using a complex forumla that GM has programmed into the car. This formula takes into many variables such as engine RPMs, load, engine temps...etc.


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post #8 of 22 (permalink) Old 05-02-2010, 05:49 PM Thread Starter
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ok cool well since its been about 5k miles ill get and oil change on tuesday but what brand and type is best? i heard 5w-30 mobile 1 full synthetic is best.

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post #9 of 22 (permalink) Old 05-02-2010, 05:59 PM
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Quote:
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ok cool well since its been about 5k miles ill get and oil change on tuesday but what brand and type is best? i heard 5w-30 mobile 1 full synthetic is best.
That's what I use. Walmart has it for $23.50 for 5 gallons.

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post #10 of 22 (permalink) Old 05-02-2010, 07:08 PM Thread Starter
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That's what I use. Walmart has it for $23.50 for 5 gallons.
oh ok i would buy it and do it myself but im too scared of messing it up lol but at an oil change place u get to pick your oil right? and they change your filter?

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