Not wondering for my own purposes, just curious what you guys live by. I know people that change synthetic at the same interval they once changed dyno oil. There are people that go by the oil life monitor even if that means 15000+km.
- how often (time span vs mileage)
- type of oil - syn? dyno? viscosity? brand?
- Additives? - Seafoam, for instance
So what is your routine?