The oil dipstick level keeps increasing on my f350 diesel. I drained excess thin fluid of about 20 quarts when I changed the oil. I think I have fuel leaking into the oil. Where does it come from, how do I stop it? Someone saild put dextron III ATF into fuel and it may help seal.

 

Read and check it
https://www.ford-trucks.com/forums/9...r-o-rings.html

 

There are two main sources. First is injector o-rings, and the second is the fuel pump itself can leak. I had to fix both of these problems when I bought my pickup. Both of these are DIY jobs if you are able.

 

I think that might be an injector oring issue, there pretty simple to do aswell