right before I put Wards fans on my 10 street glide. I was stuck on i5 because of an accident it was stop and go for better than 5 miles with go being only like 15 miles an hour I disabled heat management just to see how hot it could get. Power vision ET Read 358f bike ran fine. After I put fans on in any conditions it would never get over 260f.

 

You are right about that!
There must be a rule of thumb to calculate this for bikes. I know that for cars the rule of thumb is:
A good quality oil is built to last 6,200 - 7,400 miles at a temperature of 176 F. For every step of 50 F you have to cut maintenance in half, that's why OEM recommands to change oil at every 3,000 - 3,5000 miles because car engines runs around 226 F.

I beleive that peoples who lives in warmer regions like the south part of USA must cut their oil changes interval compare to peoples who live in northern regions like Canada.
I think that the best way to see how long your engine oil will last is to do regular oil analysis.

 

Most conventional oils do too, like Valvoline V-Twin 446F or Valvoline VR1 478F , no need to spend 12+ dollars for great oils.

 

COOL video... Anyone know if HD does tours of that facility?

 

Most engine oils have a boiling point at around 590F, the big difference between a regular and high-end oil is the quality of the base oil and its additives. So yes, it's worthed to spend the extra dollars.