Hey guys... I searched before posting but couldn't find my answer. I purchased my bike not too long ago and I've come up on my first oil change (in my ownership). It's an 03 636 and I just clocked 12k miles on it. I am unsure as to the type of oil the previous owner was using (non, semi, or full syn). What do you guys suggest to go with? Blend, brand, etc... I'm in Colorado so it gets chilly here but summers are hot (lately in the high 90's and low 100's). Let me know or point me in the right direction! Thank guys!