Oil suggestions

[Adirtyrider]

Im looking at two different brands of synthetic oil AMSOIL and Red line.
Should I run 10w40, 20w50, or 20w60?

[F'ing pumped]

why not just run what it tells you in the manual....not meant to sound like a smartass

I understand that ktm is bed fellows with that motorex oil, but like i just read two seconds ago by baja...oil is cheap, engines are not

[Werfel.gartner]

Although oils will mix and not cause Immediate engine damage, it is always recommended to change oil as soon as possible if the need to mix occurs. Oils have different additive packages and by blending oils you may adversely effect the performance and longevity of the oil.