A friend of mine has 2000 450es and after about 2-3 mins of running the oil light comes on.It is full of oil and is not to running too hot.Does anyone have any ideas.

 

Not sure about the 450es, but since it has the same LCD pod as the Rubicon, what I thought was the oil light turned out to be the temp. light. If you are referring to the small light at the upper right hand corner of the pod. I had a dirt clod wedge between the fan and the fan shroud on my Rubi and it would try to overheat. Maybe he has bad sensor or thermostat? Hope this helps, but probably not.