I did an oil and filter change on my Ghibli petrol today. You have to take out one of the air filters to get decent access to the oil filter. I wasn’t overly surprised to find that at the last service in January the air filters hadn’t been changed, same with the pollen filter. So I’m going to order them up from Scuderia and change them. Looking at the service schedule at the third service/37500 miles the spark plugs should be changed. So on a time basis they should also of been done which again I doubt they have been. My question is, the car has done 25000 miles so do I still need to change them on a time basis or do I leave them until the 37500 mile stage?