Thanks goldbrick for that great explanation:) Just dropped the car off doing brake fluid flush for $125 and Nissan recommends that the gear reduction fluid be changed at 48,000 Kms ( I am at 49,000) I told them to do it , cost $100. Not sure if I got suckered on that but I figure at least I know it has been done and $100 didn’t seem to much. They tried to sell me a $420 service which included the two items I am having done already plus tire rotation , multi point inspection and cabin filter change , I told them no. I’ll change the cabin filter myself and the filter costs only $20. I know the previous owner did zero maintenance so figured best I do some.