Check the fuel rail pressure after it has sat for a few hours, if down low or zero you have a leaking injector like posted above. You have hard starting with many restart tries? This will not only cause flooding with fuel in the oil but also remove oil coating the cylinder walls. The fun begins to find the leaking injector if you have one or try an injector cleaner hooked to the fuel rail with the fuel pump fuse removed. This way you'll run off the pressurized can of cleaner only.
Better yet pull the injectors and have them cleaned, tested and balance flow checked.