oil conversations going around based on some stuff some guy told u a while back or something u googled.
Dont guess, use facts. Do UOAs and work out what it means then do I few to see what it going on.
you spent 15k on an engine and then guess or skimp on ur your oil? lol People have been using Redline GEAR oil i.e. shockproof in thei GB...no suprise to me we read about them dying. Use a GB oil with the approipite friction modifiers, not a gear oil. If u change ur oil veer 2k then yeah no point use M1, Moly oils like redline need to go for some time to get the addatives to work.
Make sure u use a Group 4 or 5 oil. Not this 3 stuff like the castrol being mentioned.
As for extra viscosity...for a pure track car...no drama. Check the cSt ratings at 100 deg. W60s or similar have high numbers.
for street...use 40 as a max...its not about piece of mind its about the right applciation. 90% of engine wear occur at startup and W50s or 60 take ages to get to op. temp. Fine for the track,