Your leaking oil filter housing gasket has been bothering you for months. Its dripping onto the driveway, requiring a weekly top-up with expensive synthetic oil. “How much money can I waste on oil this month?”, you ask yourself. I totally understand why the average BMW enthusiast would avoid this job for months at a time, however. Digging into this project will take anywhere from 4-6 hours depending upon your proficiency and what other items you replace along the way.