This is just curiosity (since I think it's normal). I recently got a bluetooth OBD2 connector and the torque app on my phone. Cruising on the highway, typically KR was 0, but periodically it would hop up to 2-3* (the highest I saw was 5.7*). This would be when going up a hill typically.

I remember reading that NA engines will usually have KR, but I'm just not sure what's normal. The whole bluetooth adapter + Torque app is pretty cool :P