Does the engine make any ticking noises at that time, and is the oil pressure good until it warms up ? It could be too light an oil, or may be in need of an oil change. Before getting too worried, put a manual oil pressure guage on it just to be sure.
Sometimes a bad sending unit will give you a false reading, a manual guage will not. Hope this info helps.
mickey-d
Dec 4, 2009 at 2:45 PM