I thought the oil change interval is 14k miles? Is it better to change every 5,000 miles? I only change when my iDrive told me to do so, since it's free for me because I paid the maintenance agreement.

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2009 BMW 650i Cabrio (daily drive)
2011 Audi A4 (groceries, bully, road trip, winter beater, family car)

BMW CCA ID: 473647