no offence taken here, no worries.
based off of "stock" (like cattle) where the oil comes from/made from, i would say no one has anything over Redline's polyol-ester blend besides Motul; its an almost pure synthetic. also with the insanely high numbers of micro lubricants in Redline (molybdenum, phosphorus, and zinc) i doubt subi is any better and i doubt they even match. throwing a bearing with all 3 of them in high numbers you'd really have to screw up somewhere! i dont know your friends weight but i can say 100% throwing a bearing wasnt due to a heavier weight in an evo, stock or modified, unless it was gear oil. 400, 500, 600+ hp evo's i can promise dont run a factory weight when racing.
weight is a broad spectrum for temps and what the motor can handle. the biggest danger one could be in is a heavier weight on start up like a 10w, 20w etc if its to cold. once hot the motor is fine running a grade or 2 higher. my motor wasnt meant to increase power by 60% per cylinder! the slightly heavier weight performs a hell of a lot better when racing and increased cylinder temps. the last thing you want is pre-mature break down and your oil to run like water with 420bph going around a track. most guys even use a 0w40-0w50 when racing. id say every person of knowledge on nasioc runs a 40 weight.
biggest reasons for spun bearings- old/dirty oil, low oil, beating on a cold motor (oil you do have isnt hot enough to get into the space and let it nicely spin), worn out from abuse, clearance issues, vibration (un-balanced), over revving stretches the rod and the bearing spins out, coolant or gas in oil lowering viscosity, or to much boost/power crushing or squashing the bearings during the lift or fall of the rods. some of these dont apply to the main bearings.
Scott-2011 WRX 335HP 394TQ 93 VF52!