I tried asking on some of the FB pages because I hate to pester you all with the simpler questions.
I have an 88 with the 2.5/ isuzu 5 speed.
Replaced the rear main.
New oil pan and gasket.
New timing cover and gasket.
New valve cover gasket (3rd one finally worked)
Replaced the dipstick o-rings.
New oil pressure sending unit.
These are all things that needed to be replaced anyway as they where old and dry rotted.
I'm still getting a major oil leak from the starter area. I dropped it down and could not find where it was coming from.
1988 Fiero 2.5