I just stick with the Mobil 1 synth. I cannot justify $8/qt myself.
A few years ago I stopped changing every 3000 miles after reading some research saying that that causes more engine wear or something to that effect due to a "break-in" period on the oil. Presently, I do it every 5000, but it still seems unnecessary. There is this "high endurance" synthetic now that says to change every 15000 miles. I would bet it is all the same crap, but they have the market convinced that you will ruin your motor if you do not put new stuff in every 3000/5000 miles with the non-"high endurance" mixes.
How about we get some real scientific research in here? I would LOVE to not have to change my oil so damn often. I have no problem doing the filter, but all that oil seems like a waste. I recycle it, but I still doubt that it goes anywhere GOOD. I am all-in for helping out the environment.