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As above moderate driving with a little boost every now and again. Every builder has their own opinion on this, I was recommended a couple of hundred miles using a mineral oil (synthetic provides too much protection for rings to bed in correctly) drop the oil and replace with quality oil with a new filter
If you have dropped new piston/rings into original untreated bores there basically is nothing to bed into, as a basic requirement they need a glaze buster in them to give the ring a chance to bed into the bore finish.