So I have a question about my 2020 Subaru Outback, so I bought the car for my wife last year and it has just now hit 60000 miles and the dealership gave me a list preventive maintenance that needs to be done every 60000 miles, and Im trying to do them myself, like changing the transmission fluid and front and rear differential fluid, and the question I have is do you have to use the name branded Subaru fluids or can I use other fluids like vavoline ? And the spark plugs need to be changed as well and do I need to use Subarus spark plugs or can I use other brands as well ?