Hi amnshelton,
If the reservoir is depleting, there definitely is a leak in the system. You would need a pressure test to find out where the leaking is coming from. Hopefully you have not damaged the head gasket yet.
The reservoir is not an inidication that the radiator coolant level is full. Before the reservoir dries up, the coolant level in the radiator would already be low and that would cause the overheating.
The oil consumption is due mostly to worn valve seals and piston rings. To reduce the iol consumption, you would have to at least replace the valve seals.
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Sunday, December 27th, 2009 AT 1:30 PM