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Old 07-11-2009, 11:45 PM   #13 (permalink)
stevey_frac
EcoModding Apprentice
 
Join Date: Jun 2008
Location: Cambridge, ON
Posts: 240

Jalilah - '07 Chevrolet Cobalt LT
90 day: 40.57 mpg (US)
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The oil change interval on my Cobalt can extend up to 10k miles. Factory. And for the type of driving I do, i think that's fairly conservative.

Once i'm out of waranty next year, i'm going to start an oil analysis program and extend oil changes to twice a year, about every 20k miles.
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