I have been wondering about better cooling. Been using Mobil V-twin 20/50 since it came out, right after I bought bike in 02. They use to make Triumphs oil.
I noticed they now use castro oil. Will use it on next oil change, Bike seems to run hotter since I had 120,000 miles. Have 130,000 on it.

I was so much older then, I am younger than that now (Wrote By Dylan Sung by the BYRDS,)