1985 Mustang oil pump

85 could be an odd ball year,they may not have oil pumps,then again,mid year they were installed inside the fuel tank, or under the spare tire

I suggest you take a good shot of some mind-altering substance, then open up the oil filler and fall in, you'll see it when you hit bottom.

Here's the point: if you have to ask, it's probably dangerous to you or the car's health for us to tell you.

It's in the oil pan.

Al