There are many opinions and we will never all agree.
I feel the rings are what need running in, the bearings should be correct clearance and are non contact. As long as fuelling is not rich or lean then the rings should bed in normal driving which should include engine braking.
Seens lots and one I actually liked was mineral oil, start it and set map up, drive at under 2000rpm to 3rd, engine brake to 1000rpm. Drive to 3000 and engine brake to 1000rpm, then 4000rpm, 5000, 6000, 7000, 8000rpm with cool down time between to make sure oil temp not too high, then drop oil and fill with fully sync and strap to dyno and map to 600+. But importantly the map was monitored and altered through out.
Simon
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