I have used prolong in the past and have found it to do exactly what it states.
In fact my job took me to very remote places for extended periods of time and when I would come home one of the first things was to pull the dip stick on a Suzuki sidekick and check for oil.

Wife was ER nurse oil was last thing on her mind after 15hr days.
Several times the oil was not present and took one full quart to get it on the stick and that little 4 banger just to this day keeps ticking.

Almost 200,000 miles on it now.

I am thinking that as well as it works in heat reduction on the 4 cylinder it might work for the V twin.
Just my experiance