I bought a used 07 zx6r and did my first oil change. I have no idea what the last guy had but it def wasn't kawi oil. I changed into kawi oil and she doesn't want to shift for anything once it gets warmed up. I'm always stickin from 1st to 2nd. I'm thinking of going motul 5-40. Anyone have an 07-08 with Rotella T 5w40 and Amsoil 10w40 or Motul? Does it feel much better than kawi 5-40?