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Originally Posted by joosrsx
Are you saying you only change your oil every 20k? Does Porsche have some special oil filter that last this long? I know the synthetic oil will last 10-15k but the filter...
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There's a couple reasons for the long service interval.
1. it's politically-correct
2. 3000-mile service intervals are kind of silly with modern tech
3. These engines have a "dry-sump" setup so the oil doesn't sit in a grimy oil pan, collecting crap.
4. Nine quarts of oil can dilute a lot of crap.
I change my oil every 10,000 anyhow.
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