Yes the SN3 is made by Citgo, I just switched to AMSOIL during a trip back to the Mid West and love the stuff alot of hard riding and did great, had the SN3 in it and saw a huge diff. over all. But who is to say that Mobile 1 is not as good but sticking with the AMSOIL for now.
Not to mention also that SYN 3 is a blend and not pure synthetic oil. You are better off using mobil 1 v-twin or amsoil
Syn3 is a blend of three full-synthetic oils and is not a deficient product, contrary to popular belief. It is, however, overpriced and there are better alternatives available for the money. Perhaps the best for the buck is Mobil 1 15w50, which has been given good reviews in three oil tests by MC mags. At $26/5-qt. container at Wally World it is likely the best bargain available.