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?
  • car/engine
  • Additives? - Seafoam, for instance
  • DIY?

So what is your routine?

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