[JoelD]

Maybe I'm not getting something but bottom line is, your pressure is low and your motor will fail if you continue to run at low psi. If under warranty bring to Kioti and have them fix. If not under warranty order the new oil pump and install. The weight of the oil, unless you go down to 5-20 or something like water you should be fine. Oil pressure is key, without it your done. Oil pump can only cost so much, not clear to me the reluctance to replace the oil pump. Not trying to be critical, I just could never risk my motor over an oil pump, a lot easier to replace an oil pump than a motor.
Joel