BMW 6 Series GT Service Cost (5 Year) of 630i Petrol, 620d & 630d Diesel engine. Service interval is 1 year & 8,000 km. Warranty  BMW 6 Series GT is offered with 3 years / unlimited km of standard warranty BMW 6 Series GT 5 Year Service Cost  No. Of Service  Schedule  630i Petrol 620d … Continue reading BMW 6 Series GT