Check the Isuzu site and you'll need the year. Check either for "oil" under parts or look for the user manual online.
Note that the oil viscosity (10-30, 20-40,...) changes according to the how hot or cold the average weather is.
As for what brand, regular or synthetic,... That's personal opinion.
As for additives, I've used Slick 50 in 3 cars, 1 pickup, 1 SUV, and 1 motorcycle and they all ran smoother, but no noticeable change in MPG.
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
Isuzu Trooper was created in 1981.
with an axe
1999 Isuzu trooper
6.5 quarts
5W-30, preferably synthetic.
Same location where you pour the motor oil