oil and filter change done by dealer 12 months ago using Castrol systhetic oil. Since then, we have driven only 1600 miles, wondering if I should now change the oil even with such low mileage?
oil change interval for low mileage BMW on 2007 BMW 328i
I certainly would. They say 3 months or 3 to 5000 miles with regular oil. Sythetic I would change at no more than 6 months.