This would be a fun poll to run:
Why do you think Porsche has deliberately changed their recommended viscosity rating to 10W-60 for the SC-3.2-964-993?
- With 10W-60 oil, engines will break more often and they will be able to sell more parts/service.
- It's all run by marketing and they just picked a random grade.
- Someone at Porsche thought that 20W-50 for all aircooled engines would be too boring so they specified 20W-50 for the older aircooleds and 10W-60 for the newer.
- Based on their experience, 10W-60 is the modern oil that currently works best for the SC-3.2-964-993.
- Other. Please specify.