I have an '02 CBR 954 that's inline 4 , water cooled. So far I have run in it: Honda GN4, M1 15-50, and M1 Vtwin 20W-50. I recently ran the 20W-50 because of a recommendation by a person on a bike site that tests oils. He was always concerned about running long OCI because of fuel dilution. What are your thoughts? I'm thinking of going to Amsoil 10w-40 motorcycle specific next. I do a lot of short trips around town, stops at traffic lights, occasinal long trips, wheelies (feathering the clutch), etc. Riding usually consists of going from gas station to gas station to pick people up, hang out etc. I should've bought a moped! I currently change oil around 3000 miles. Give me your thoughts.