can I run engine oil and diesel fuel at the same time?

I have 99' F350 7.3 turbo diesel My oil pressure sensor stopped working and it sucked all my engine oil trou the rechurn line in to my tank ofter I changed the sensor can I run with that oil in my tank or I have to flush the fuel tank?
I started my truck and it runs really grait! But my concern is my pistons burning up!