, so after reading this data I'm afraid of how low my wear protection dropped on that trip.>>>>>>>
My experience, the difference between a 5w40 and a 20w50 on (max water temps) in 100 degree heat, is one or 2 degree max. Actually to close to call as any effect at all. My vfr never sees more than 227 dgree max ever, there was one time I saw 230 degree, just a non issue.
However I tend to run standard coolant (prestone 60 to 70% mix), where many riders are trying various concoctions, from engine ice , to water wetter and water.
Just an non issue for me, ever, I run the same stuff in my KTM race motor also, where others seem to always have issues with boil over, although good mapping or jetting plays a role too in motor heat.
When my KTM 500 single cylinder was new *(less than 3,000 miles), I produced less metal in a uoa with more mileage than BLS's 50,000 plus v4 , that is damn near funny. Yet he continues his quest. to enlighten.
However my experience with light weights and high sustained rpms , light weight oils show earlier cam lobe wear , and the reason I don't run 30 weights in High Rpm Motorcycles.