Low oil pressure

Good thing I have never seen a Taurus, Hundai, Toyota Tercel, Mazda 2200, anything Mitsubishi, Neon, Civic, etc. You are correct, I am just making it up to look like a dumb ***. I have never worked on cars before so I dont know ****.

OP go ahead and put 10w30 in it, drive it hard and if it eats itself you can blame the "expert" advise you got from guys that might be a plumber, waiter or maybe a gas station attendant. I certainly havent seen anybody claiming to be a professional mechanic respond. I even asked but got no answer. Its pretty easy to be an arm chair quarterback!

Anybody else with with a shop or professional experience care to chime in?

At least now you know what oil to run in your 5 cyl GM, Honda or Blazer :D