I thought I would give an update, about 4 years later, on my diesel fluid in my oil, in case someone else has this problem. I have approximately 190 hours on tractor now. No problems at all, other than this. I never fixed anything to do with fuel in oil in all this time, I would just change the oil way more often than normal. I do not use my tractor very much. It was so easy to change the oil, and I always though it would be an injector problem. The last oil change only lasted about 10 hours between them, and the level moved a little ways up the dipstick quicker than normal. I never let it get very "diluted". I decided to change the $30.00 mechanical fuel pump when I changed the oil. That was the problem the whole time. Should have done it long ago. After it was out, I could hold the pump in my hand, add some fuel to it, push the plunger in and out a few times, a good amount of fuel would pass by the plunger and housing, going right into the oil pan. Guess it got worse over time.