Its a old traditional wet sump.
Further to conversation about oil changes, yes the oil does take a while to drain, even then there will be residue still in there. Thats why some recomend using a good engine flush product. But, if you change it at reasonable intervals say 10K miles, it should still be fairly clean oil that comes out. Now - This may shock you - its an old trick that my father used to do, but one of the best ways (and cheapest) to flush is to get equilevant quantity of deisel. Pour it in, up to the full mark on the dip stick. Start the engine and let it idle for around 20 seconds, and then let it stand for half an hour and drain. When it drains out its as black as the oil was!