What is the best oil for your 2003 Yamaha v-star 1100 classic?

I use Mobil 1 20w50 synthetic with no problems

WAIT TILL ALL YOUR SEALS START LEAKING AND YOUR CLUCTH WILL START SLIPPING ,,, GUARRANTEED I GOT V STAR S\CLASSIC ,, AND THE BEST OILTO USE IS CASTROL SEMI SYNTHETIC BLEND