Any facts showing "regular" oil better?
I cannot believe there is an actual discussion about the benefits of syn over non-syn in this day of high and higher performance everything.
Non-syn is cheaper, period. That's its only benefit past break-in. How much is your K12S worth?
I've used RedLine (and even Mobil 1) in Honda cars, Ford trucks, BMW cars and now my K12S. In 23 years I have never worn out an engine with routine oil changes (3k-5k miles) 'course everything ELSE wears out, like suspension parts, etc. & I want a new toy now and then. But compression checks have consistantly been within spec at 150k miles and 200k miles.
My M'cycle race instructor changes his non-syn oil every 200 miles! A bit of a fanatic but his very, very, old Dodge van is approaching 300k miles on the original engine... Yeah he is weird... but with syn. (at 5X's the price) he could go 400 miles between changes at least!! Syn stays fully functional longer.
With a syn oil I BELIEVE my K12S can tolerate high temps and max revs longer... Belief makes it so, no?