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Fuel in the oil?!?!?!?!
So, here it is. 2003 F-250 6.0L with 59,123 miles The last 4 times (change every 5k, 20K total) I have changed my oil I have noticed an excessive amount of oil draining out. To be more precise, the last time I changed it I was able to recover all the oil that drained out and it added up to 19 quarts. I always change it hot, and let it drain for approx 25 min and refill with 15 quarts. So I have an extry 4 quarts each oil change, smells alot like diesel, and the oil appears pretty thin.
The truck runs fine, I didnt notice it running any different. My MPG's did go down from 17-18mpg to 14-16mpg. I drive the same routing every day so all is pretty consistant, to include where I get my fuel. I tried switching fuel stations, no change. Coolant is good, no smoke, seems to run fine.
So, down to what I think, I am thinking that since thier is no performance issues, I am using/loosing more fuel, I have more oil draining out. I think that maybe the upper o-ring on one or more of the injectors is leaking fuel into the valve cover and into the oil. What do you guys think? What course of action should I take.