I have an early 04, so it should be the same as your o2, and just received a factory notice that they are extending the warranty on (at least) the 04 models to 7 years or 200K miles for cracked injectors, listing one of the symptoms being fuel in the oil.
its one thing for them to repair the problem, but my big concern is that what are they going to do about the potential damage to the internal engine components with fuel in the oil. I have always run Delo 400 in all my diesels (2 rams, and one duramax - I miss the dodges soooo much) because I believe that you'll get out of your truck what you put into it. So, if this is happening, regardless of what oil you use, when you add a bunch of diesel fuel to the engine oil, you significantly modify the lube properties.
2004 LB7 White Crew-Short
Edge Juice w/ Attitude tuner
6-inch RCD lift
18" MB Rocker rims
35" Cooper STT
Sled deck when there's snow!!!!