If your doing much pulling or thinking about putting a chip on an egt (exghaust gas temp) gage is imperitive on these trucks. I went with Total Diesel Performance for my chip. I looked for a long time and most said that Tony Wildman was the best on 7.3 tunes. I wouldnt go with generic tunes. Get custom tunes that match what upgrades youve done to your truck, makes a big difference. Ive heard nothing but good from Swamps and Beans Diesel.
As others have said changing the oil and filter every 5k and fuel filter at 10 to 15k. The injectors use oil to fire off so clean oil means a bunch. On the front of your engine infront of the fuel filter is the HPOP in the top of it is a 1/4" drive pipe plug. Next time you change tit he oil vaccuum the oil out of there and replace it. Start the engine for a few minutes and repeat a couple more times, this oil is what operates your injectors. It is supposed to mix with the rest of the engine oil but doesnt, you will see how dirty is. Doesnt need to be done every oil change. 200 is nothing on these trucks, my cousin has 560,000 on his. If yours is an auto change the fluid regular.
Fletcher