Owners favor 10w60 oil (Castrol Edge Supercar or BMW-branded) with roughly 5k-15k intervals and annual changes regardless of mileage, treat sparse records as a red flag, and note the critical 1,200-mile break-in service and CBS condition-based intervals.
Maintenance regimen: oil, service records and break-in
BMW E9x M3 (E90/E92/E93, 2008-2013) · ownership