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What is the recommended oil for an 2008 Cobalt LS- Does the wrong oil affect the avg mpg?
Modifiedone
Oil honestly depends on your weather and mileage of the Cobalt. If you live in a colder area, you want a lower weight, say not 10W-50, you want 5W-50 due to the nature of the beast, it'll start easier. I run 5W-50 during the wintertime here where it goes from 30-60*F and run 10W-50 or 10W-60 during the summertime. Synthetic or natural is pretty much your only options between oils, I switched from natural to synthetic at 20k miles or so, but you can switch whenever you want, just make sure you do it all at once and drain as much out as you can. Or if your a fan of Castrol like myself, I went from Castrol Natural to Castrol 50/50 Blend to Castrol Syntec for my conversion. But be warned that the Synthetic molecules are smaller than the natural molecules, and therefore you have an easier chance for discovering a leak, not a bad thing mind you, but its just somethign to keep in mind.....
The recommended oil for the 08 cobalt is 5w-30 and that's good for all weather conditions, you will get better gas mileage sticking with the recommended weight oil.
The above is answer is true, however if you live in an area like me that regularly exceeds 105*F outdoors, the higher weight oil is what you want for lower operating temperature..
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∙ 12y ago
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