I have a 14' and I don't remember seeing a Mileage Interval in service manual for SC oil change. My understanding was these are Lifetime sealed units, oil in snout and greased gears in the back. Is that not accurate?
you are right.
I bought the car in last year. Car has 29k miles. I thought that I know nothing from the previous services of my car. Therfore I made for me a list that I want to exchange. For example oil, all filters, spark plugs, supercharger oil, air filter, brake fluid for DOT 5.1, coolant fluid, etc.
The service book does not write change the oil of supercharger but according to my experiences, the oils and the fluids are aging. The engine oil has only 6 MONTHS! And the brake fluid and coolant fluid have 2 years!
I exhanged the transmission oil on my 1998 year Daewoo Lanos, after 20 years. The shift became easier and quieter.....
So I think after some time it is worth replacing all fluids.