Late 99 no start. Oil in fuel filter housing
I have a late 99' f250 crew cab with 276k on it. Parked it and it sat for about two weeks. Got in it last night and it cranked and cranked but no start. Checked the fuel filter and fuel looked dark. Drained the fuel bowl and itt looks likes engine oil. There is no smoke when cranking. I cranked until batteries ran low. Charged batteries overnight and after cranking it over for about 45sec it fired right up. I noticed while cranking the tach did not move until it started. What do you think?