Is pretty much what my car did today. I was going out for something to eat, had been driving the car for maybe 5 minutes and it was acting a little funny, but not bad enough that I was worried. Suddenly I've got hardly any power in any gear, then the RPMs just drop until the car dies. I pull off onto a back road (coasted there) so I was out of traffic. Tried starting it a few times and it didn't want to do shit. Popped the hood, hopped out, opened the hood, and found the entire driver side of my engine bay was covered in oil. Looked under the car and oil was dripping from everywhere (it has sprayed all over the wheels, steering column, struts, spring, control arms, lower pulleys, etc). I saw oil leaking pretty steadily from the oil filter and possibly around the oil pan. Pulled the oil cap off the valve cover and it was smoking pretty good.
I ended up calling a buddy who just so happened to be eating at the place I was headed to so I was like 100 yards from him. He had his dad's F250 Super Duty so we borrowed a car dolly and got my car back to my place (fucked up the front bumper bad getting it on the dolly, 4x4 stance is still too low for that shit). Now the car is just sitting there. My buddy thinks I might have thrown a push rod but we're not totally sure.
Any guesses on what's wrong before I go start taking the engine apart?