Hey guys, I've got a 2000 discovery with around 92k miles on it.
I just had it in the shop a couple of weeks ago and had a bunch of
stuff replaced... Intake manifold gasket, radiator hoses, ignition coils etc.
Truck seems to be running fine, but after the engine warms up, when I'm at idle
the oil pressure light comes on. Once you press the gas it goes right back off.
I have checked the oil level and even did a full oil change last weekend.
Also, the oil has developed a grey color and I'm really worried that something is leaking.
Any thoughts on what could be wrong? My mechanic said it might be a faulty pressure
sensor. I'm hoping I can get back to him in the next few days.

 

STOP DRIVING IMMEDIATELY!!!

You have low oil pressure and the grey tint is bearings destroying themselves! Do not drive it to the shop, have it towed to have the pressure tested. That sensor kicks at 8PSI. normal pressure should be in the 30's. Not trying to scare you, but you could be killing your engine.

 

You should be worried, as already mentioned, "STOP driving it" and have it towed to a shop where they can verify the oil pressure when cold and when warmed up.
Let us know what you find.