I own a 2001 ford f250 6.8 v10 it was running rough so I was checking spark plugs and found oil in the first 3 on passenger side. Can anyone help me out with what is causing this?

 

How many miles does your truck have on it?

 

183,000 miles

 

This is the second time this has happened first time I thought it was my fault being sloppy adding oil between oil changes this time I know for sure it was not me. Both times this has happened I cleaned out and sprayed brake cleaner then blew out with air truck runs great until it fills up with oil again

 

Ah okay. If I'm reading you correctly, this is oil down inside the spark plug well, not in the combustion chamber? If so, then you have something leaking oil, like a leaky gasket somewhere around that spot. Should be a trail of oil coming from somewhere leading to the low spot around those plugs.

 

The only place I know of that can leak oil on top of the motor down into the spark plugs is the valve covers.