Sorry in advance if this ? Has been beat to death I couldn't find a answer. I just bought a 07 400ex and run synthetic oil in everything I own with a motor! The previous owner before me ran Napa 10-40 in this bike for past 4 years of her owning it! Am I wasting my money if I start running mobile-1? I know it has prolonged change intervals but will that be all I'm gonna benefit from it "are the motor and tranny gonna notice the difference" sorta speak? I still change it every 3 rides with synthetic average 4 hr rides not racing! Thanks in advance guys