Sheesh 20%? Is it Boat or Heli fuel ??
I suggest VP 30 or torco 30.
Mccoy mc59 Os a3 Force Hot, etc
After a full tank and hard run, you should see 190-200 at the head. You want to get to 180 at least that is where In my opinion a mix of good performance and long life.
Break In pinch...