major oil leak...what could it be?

[Davidf]

So, my wife called to say low oil level warning popped up. I told her to go to auto parts store and add oil. See did and go the car home. I then told her to look for oil on the ground. Wellll, she found a very large pool of oil. Uh oh, leave the car at home and I will look at it later.

So, I am suspecting the infamous oil cooler block at the engine (4.8i). Where else should I look. Leak is mid-left of engine...classic for oil cooler block and I already have the gasket as I suspect it was leaking a bit due to small spots on the garage floor. Now, it let go I guess.

110k miles.