Hi I have a 94 Ford f150 4.9 inline 6 with 130,000 miles on it an there is gasoline in my oil pan an there is gas pouring out the throttle body when I turn the ignition on. it's just my work truck and I wanted to know what is causes the gas to mix with the oil and pour out of the throttle body. Thanks for the help

 

One possibility is a ruptured diaphragm in the fuel pressure regulator. The regulator is vacuum operated, and the vacuum side of the regulator is separate from the fuel side, unless the diaphragm ruptures.
If it's ruptured gasoline can be entering your intake via the vacuum line.
If you remove the vacuum line from the regulator, it shouldn't have fuel in it, or smell like fuel.
Be careful. It could be pressurized at 60 PSI.
One way to relieve the pressure is to trip the inertia switch, then crank the engine several times, as if you're trying to start it. With the situation you're describing, it may start anyway.
On a '94 the inertia switch should be behind the passenger's side kick panel. Pull up on the red button to trip it. Or, you could remove the fuel pump relay and crank the engine.