Nissan ester oil is supposed to be changed every 3750mi per the manual. It's NOT a synthetic. Pushing oil changes out to 5,000 or even 10,000 mi is best done only with synthetic oils. I'd be changing my oil more often if I were you and still using Nissan Ester Oil.
**edited to fix interval to 3750**
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2013 Cadillac V-Wagon, RIP Z
Last edited by spearfish25; 02-09-2010 at 04:34 PM.
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