I'll be buying a 2018 Subaru Forester Touring with the 2.5l NA motor.I do mostly highway milage and I plan on break-in in the motor by what the owners manual states.My question is would it pay to leave the factory fill in for the entire oil change interval(6K) or cut that in half and replace at 3K with Castrol Edge 0w20 with Subaru oil filters?Thanks Joe
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