What Is The Best Oil For Harley V-twin?

What Is The Best Oil For Harley V-twin? Best Overall: AMSOIL FULL SYNTHETIC Motorcycle Oil 20W-50. Runner-Up: Mobil 1 96936 20W-50 V-Twin Synthetic Motorcycle Motor Oil. Best Budget: Castrol 06116 POWER1 V-TWIN 4T 20W-50. How often should I change synthetic oil in my Harley? Motorcycles needing semi-synthetic motor oil can usually last between 5,000-8,000 miles