The motorcycle specific Mobil 1 oils are good. Only the Mobil 1 Racing oils are actually Syn based oils. Everything else is primarily Group 3 petroleum oil (which is still good), with some syn (group 4 & 5 oils) blended in. This is the main reason their Racing oils cost more.

Those who would give up essential liberty to purchase a little temporary safety deserve neither liberty nor safety. Benjamin Franklin, US author, diplomat, inventor, physicist, politician, & printer (1706 - 1790)