start it up let it get warm (run in on cheap mineral oil crap about £5 for 5 litres)

go round and do a couple of laps upto about 50 miles using various revs and getting it into boost but not reving it tits off

come back change oil & filter for 10/40 normal stuff then do another 50 miles or so driving it a little harder and upto standard boost setting

The another oil & filter change fit 10/40 semi-syn oil run around like this another 100-150 miles

Then Final oil & filter change fit correct oil for engine & replace plugs

And then it just gets driven normally with full boost setting and with the 10+ engines i've built (3xYB, 4xC20xe, 2xC16se & 2xC20let) they all been spot on never used oil and as far as i'm aware the 2xYB are still running spot on and 400BHP+