The service manual I have is for the dual sport xr650r that is not sold here in the US. It lists service intervals in miles/kilometers. I have a hour meter on my 02 XR650R and need to know how many hours I should ride between oil changes. I always use Mobil 1 15w50 synthetic. Right now I have 12 hrs since the last oil change and it still looks pretty clean. I ride 100% dirt around Las Vegas.