I've been reading your guys posts about break in oil in John Deere Tractors. Is this a special oil they put in at the factory? I know it is suppose to be changed at 50 hrs, however I am a real fanatic about oil changes and I would like to change my oil now at 27 hrs. I went to my dealer to get some break in oil and he said it does not have a "special" break in oil in the tractor and to just go with a new oil filter and diesel JD oil. Was I reading your posts wrong? Also, do diesel engines take a different radiator coolant than gas engines? I have been trying to learn as much as possible from you guys about these tractors. This is the first diesel I have owned. Thanks..