engine builds I have been a part of: 1. Fill with conventional 10W30. 2. Run engine for 20 minutes. 3. Drain, change filter and refill. 4. Drive about 1000kms, keeping the engine out of boost, but running the engine throughout the RPM (even up to redline). By running the revs up high and letting them fall under high vacuum, it helps seat everything nicely. 5. Change oil to full synthetic (0W40, 0W50 is what I use).