When we got home, our first project was to change the fluids (we actually changed the oil twice within the first month to clean it out), and got this shot after we also did some suspension work. Changing the oil is very, very important to diesels, especially the old 6.2L, since the diesel blow-by gets the oil very dirty very quickly. From now on it's new oil time at every 3,000 miles with no excuses. We decided on using the premium Royal Purple Synthetic oil for the engine as well as its Max Gear Oil for the diffs and Ultra Performance Grease for the U-joints and tie-rod ends. The engine also got a new Fram Sure Grip Tough Guard oil filter. Remember, like Dad always said down on the farm, "Oil and grease is cheap, parts ain't."