I own a 2001 Jeep Cherokee Sport. I have fuel getting in your oil what may cause this to happen?

a leaky injector or a cylinder that is not firing dose your fuel pressure bleed off when the Jeep is sitting if so check your fuel pressure after the jeep is shut off if it falls off then find the rubber fuel line to the fuel rail and get the jeep running to aquire fuel pressure and turn the jeep off and quickly clamp the rubber fuel line off if the fuel pressure still falls off it is an injector bleeding pressure