its faulty
on the engine
The oil sending unit in a 1992 Isuzu Trooper is located within the car's engine. The oil sending unit is responsible for determining the oil pressure.
4.2 QTS
At the bottom of the engine oil pan.
low or no oil pressure
with an axe
No, that's an indication of a problem.
5W-30, preferably synthetic.
6.5 quarts
Same location where you pour the motor oil
5 with filter change
Its between the radiator and the engine on the bottom side.