I don't think it's a problem with my motor. In retrospect, I had learned that the Acura dealer was using Petro Canada brand oil for their oil changes. With it being as black as it was, I would assume that the mix was heavily swayed to the 'detergent' end of the spectrum, and not so concentrated towards lubrication. I started supplying my own oil... Castrol (not synthetic) at first, which yielded similar results. Then I tried Valvoline, which wasn't nearly as dark at 4000km, which I changed regardless; I was very happy with the Valvoline. I then tried Valvoline's Max Life, and noticed similar results to the Petro Canada and Castrol. Now I'm back to plain Valvoline, and I think I'll stick with it.
im using mobil1 synthetic, right now, and after 5k i still had the right amount of oil and it was as clean as when i put it in.
If it comes out looking just like it went in, it has a very low detergent composition. It is doing nothing to clean out your motor. The oil has two functions: to clean, and lubricate (well, and reduce heat, etc...) If it's ONLY lubricating, it isn't a very good oil.