According to my observation Yamalube FS loses it viscosity after 2000kms and the nearest Yamaha SVC recommends drain interval at 3000kms. Also stay away from Shell AX7, me and my friends experience with Shell AX7 weren't good, lasted just 1500kms (reason don't know, most say Shell AX7 is mineral oil marked as Semi-Synthetic
). If using Semi-Synthetic then try Motul 5100 10w/4015w50 or ELF MOTO 4 Roadstar 10W-40. Currently switched to Castrol Power 1 Racing 10w50 FS, driven around 1100kms and satisfied.



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